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FITS 2018 Toyota 4Runner
Timbren Rear Suspension Enhancement System

Timbren Rear Suspension Enhancement System

Item # TTORSEQ

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2018 Toyota 4Runner

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Timbren Standard Duty Vehicle Suspension - TTORSEQ
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Product Images

Timbren Standard Duty Vehicle Suspension - TTORSEQ
TTORSEQ - Standard Duty Timbren Vehicle Suspension
TTORSEQ - Standard Duty Timbren Rear Axle Suspension Enhancement
Timbren Vehicle Suspension - TTORSEQ
TTORSEQ - Jounce-Style Springs Timbren Vehicle Suspension
TTORSEQ - Jounce-Style Springs Timbren Rear Axle Suspension Enhancement
Timbren Rear Suspension Enhancement System Jounce-Style Springs TTORSEQ
Timbren Vehicle Suspension - TTORSEQ
Timbren Vehicle Suspension - TTORSEQ
Timbren Jounce-Style Springs Vehicle Suspension - TTORSEQ
Timbren Rear Axle Suspension Enhancement - TTORSEQ
TTORSEQ - Standard Duty Timbren Vehicle Suspension
TTORSEQ - Standard Duty Timbren Vehicle Suspension

In Use/Installed

TTORSEQ - Jounce-Style Springs Timbren Vehicle Suspension on 2012 Toyota 4Runner
Vehicle Suspension TTORSEQ - Standard Duty - Timbren on 2012 Toyota 4Runner
Timbren Standard Duty Vehicle Suspension - TTORSEQ on 2012 Toyota 4Runner
Timbren Standard Duty Vehicle Suspension - TTORSEQ on 2012 Toyota 4Runner
Timbren Rear Suspension Enhancement System Standard Duty TTORSEQ on 2012 Toyota 4Runner
Timbren Rear Axle Suspension Enhancement - TTORSEQ on 2012 Toyota 4Runner

Customer Photos


  • Timbren
  • Jounce-Style Springs
  • Standard Duty
  • Rear Axle Suspension Enhancement
The best technical support and full vehicle suspension installation instructions. Lowest price 4Runner vehicle suspension guarantee and expert service. Toyota 4Runner, 2018 vehicle suspension by Timbren are available from etrailer.com. For expert service call 800-298-8924 to order your Timbren Rear Suspension Enhancement System part number TTORSEQ, or order online at etrailer.com.


  • All Info
  • Reviews (1517)
  • Q & A (35)
  • Videos (5)
  • Photos
  • Why etrailer?

2018 Toyota 4Runner - Timbren Rear Suspension Enhancement System

3,000-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your Toyota 4Runner. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.


Features:

  • Improves suspension, handling and safety
  • Provides additional support as needed so you always have a smooth, comfortable ride
    • Allows the leaf spring ample movement while cushioning light loads
      • Does not affect the empty ride of the Toyota 4Runner
    • Becomes more rigid as more weight is added
      • Increases stability - providing great performance while hauling heavy loads
      • Reduces Toyota 4Runner sag
  • Works independently - side-to-side
    • Helps compensate for off-center loads
    • Reduces body roll when swerving and turning corners
  • Acts as shock absorbers, taking the brunt of bumps and rough roads
    • Extends the life of your Toyota 4Runner's suspension


Specs:

  • Includes 2 Aeon hollow rubber springs, Toyota 4Runner-specific brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required
  • Capacity: 3,000 lbs
    • Do not exceed the Toyota 4Runner's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Limited lifetime warranty - satisfaction guarantee


Reduced rear axle sag with Timbren suspension enhancement

Whether you're hauling heavy loads in your bed or cargo area or towing a trailer, you will often see the rear of your Toyota 4Runner sag while the front end rises. In these cases, the rear axle is handling not only the weight of the cargo, but also more of the vehicle's weight. Because less weight is on the front axle, the front tires are making less contact with the road. Overall handling - traction, steering, and braking - is negatively affected. But the resistance from Timbren's Suspension Enhancement System works with your factory suspension to keep your vehicle level and improve your driving experience.


Diagram of the Timbren spring installed

The Timbren system comes with custom-fit brackets that are bolted onto each frame rail above your rear axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down to where the bottom of the leaf spring sits, 1" above the axle. The inch of clearance allows the existing factory suspension to operate normally under light loads and standard terrain, ensuring the smooth, comfortable ride that you are used to.


Action of a standard Timbren rubber spring

Timbren Suspension Enhancement Systems are designed to work progressively. When the hollow rubber springs are compressed, the convoluted design causes them to quickly collapse along the folds. Once the folds are compacted, the stacked barrel shape increases resistance, stiffening the suspension and keeping your Toyota 4Runner level.


Timbren suspension system works to prevent body roll

Each hollow rubber spring works independently to support the driver's-side or passenger's-side of your Toyota 4Runner. This is helpful when you swerve or make sharp turns. Each spring is activated when it is needed, so body roll is greatly reduced. The independent action also works well when you are hauling off-center loads.


Trailer swaying as it is towed behind a truck

Because your vehicle handles better with the springs, less turbulence will be passed along to the trailer and this helps to keep the trailer in line. Your driving comfort is further enhanced if the trailer does begin to sway (from a gust of wind or a passing semi) because the movement from the trailer is not transferred to your vehicle. This also works to make the sway subside more quickly.


An empty truck on a bumpy road without Timbren SES

Another great feature of the rubber construction is that the springs absorb most of the road shock, creating a smoother, more stable ride overall. Wear and tear on the factory suspension is also lessened because the rubber springs work to prevent bottoming out on rough roads.


Timbren Suspension Enhancement Compared to the Competition

Timbren's Suspension Enhancement Systems are much easier to install than air springs - there are no air hoses to run, no compressors or gauges to hook up, and no manual adjustments to make. The rubber construction makes Timbren's springs more elastic than similar products constructed of microcellular urethane. And more elasticity allows for a more comfortable ride because the rubber has more travel.



TORSEQ - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren



TTORSEQ Installation InstructionsInstallation Details TTORSEQ Installation instructions

Video of Timbren Rear Suspension Enhancement System


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Timbren Vehicle Suspension - Rear Axle Suspension Enhancement - TTORSEQ Review

Today we'll be reviewing part number TTORSEQ, this is the Timbren Rear Suspension Enhancement System. It is going to be vehicle specific so to see if it's going to fit your particular year, make, and model you can refer to the vehicle list at the bottom of the product page. This system is designed to improve suspension handling and safety. It's going to provide additional support as needed so you always have a nice, smooth, comfortable ride. It's actually going to allow the leaf springs plenty of movement while cushioning lighter loads so it will not affect the empty ride of the vehicle. It's going to become more rigid as more weight is added.

When doing that it's going to increase stability, providing better performance while hauling heavy loads, and it's also designed to help reduce vehicle sag. This system is designed to work independently side-to-side so it's going to help compensate for off center loads. It's also going to reduce body roll when swerving and turning corners. The Timbren Rear Suspension Enhancement System is going to act as shock absorbers which is going to take the impact of bumps and rough roads, ultimately extending the life of your vehicle's suspension system. This is going to include two hollow rubber springs, the vehicle specific brackets, and all the hardware that's necessary for a simple installation. It's going to offer a capacity of three thousand pounds, just be sure not to exceed the vehicle's weight carrying capacity.

It is designed to work with a suspension system that's in good working order. It's a really simple installation. You will need to remove your already installed bump stop. What you can do is on the hollow spring there's actually a flat washer located on the inside there so you'll take one of the larger bolts and you're going to feed it up through that flat washer, making sure it goes through the center, and you're going to feed it all the way up until it comes through this hole so you can use a socket wrench with an extended adapter on it and the appropriate size socket. Get it up through the hole and then you're actually going to thread it into this portion here. That's already got the built-in threads in there.

All you have to do is thread it in and get it nice and tight and secure. Do that on both sides. Then basically you have the unit assembled. Once you have these two elements together you would use the existing holes on the frame of the vehicle and you would install the smaller bolts with the flat washers, bring them up through the bottom, and tighten them down into the weld nuts on the frame. Once you have that done on both sides your system would be installed and you'd be all set and ready to go. The overall height of one of the bump stops, or one of the springs, measuring from end to end, is going to give us a measurement of about three and five-eighths of an inch.

That's going to do it for today's review of part number TTORSEQ. This is the Timbren Rear Suspension Enhancement System. .


Customer Reviews

Timbren Rear Suspension Enhancement System - TTORSEQ

Average Customer Rating:  4.7 out of 5 stars   (1517 Customer Reviews)

3,000-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.

- TTORSEQ

by:

2007 Toyota 4Runner


This is regarding the FRONT installation. Which is everything I'd hoped for. The truck still rides great but no longer bottoms out over any pebble in the road. The front end no longer heals over in turns. I wanted to install a rear kit but it arrived as a mis matched box of parts. To be continued. 231435



- TTORSEQ

by:


Working great. I had read reviews about them being too stiff whem you aren't pulling a trailer, but it seems like they softened up a bit after first putting them on. I felt a few hard jolts going over speed bumps and such the first few days, but now I don't notice them at all when I don't have a trailer attached. They are still improving the ride with a heavy trailer. I'd give 5 stars but my mechanic neighbor had to help me install them because there was something wrong with the bolts that came in the package. It was a year ago and I can't remember the details. Without him I think I could have returned them and gotten a fix and installed them by myself. It's a very simple install when all the parts are in good shape. 549083



- TTORSEQ

by:

2015 Toyota 4Runner


Very EASY to install... 380156



- TTORSEQ

by:

2006 Toyota 4Runner


The simple fix for the sagging situation. With these new Timbren 'bump stops' in place, both my camp trailer and vehicle *(2006 5 Runner---better than a 4 Runner) ride level and smooth...and even looks cooler than cool. 264664



- TTORSEQ

by:

2011 Toyota 4Runner


Installation was relatively straightforward and took about an hour. Make sure that you center the enhancers directly over the axle.....FYI-if you center over the axle, the bolts may not be centered in their slots when attaching the units to the frame. I towed my 3200 lb boat trailer about 35 miles today for the first time since the installation and there was a definite difference in the ride and feel. Big bumps or variations in the pavement felt much better.....no more bouncing. Definitely a must have for towing with your 4Runner. I would have rated 5 stars but I felt the price was a bit high for the product. 213689



- TTORSEQ

by:

2015 Toyota 4Runner


Received the product and installation was very easy. The longest thing to do in the process is taking your tires off. Also make sure you have a vice or c- clamp because to tight the rubber piece to the bracket takes a lot of torque. Have not been able to test it will update my comments later 499383



- TTORSEQ

by:

2003 Toyota 4Runner


I put TTORSEQ on the rear of my 2003 4Runner Sport, I had noticed the 4Runner had settled over the years particularly in the rear when I tow a Chalet camper. I was looking for helper springs or replacing the rear springs (very expensive). I was not aware of this type of suspension support but it came up on a Google search. They work great! There is a significant difference when towing the camper. ONE recommendation for Timbren. In the installation instructions include torque values for the bolt attaching the bump stop to the bracket. I was surprised at how much torque was required and initially thought Timbren had sent me the wrong bolts - they had not. 281057



- TTORSEQ

by:

2016 Toyota 4Runner


These worked great on my 2003 4Runner Limited. I can tow my 16 / 7 ft. trailer with very little squat on the rear axel ... The install was super easy and I didn't need a jack-stand... Just a wrench... That's It !! I took some heavy dips on some Mexican roads with a 7,000 lbs trailer (700 lbs tongue weight). Also the rear cab had 500 lbs..... I was doing 55 mph and I believe it saved me from a hard impact. Courtney B... (the rep)... Recommend the product and I couldn't be happier! 273549


Comments

Its been 2 years now and all is still working well.

Mike P - 07/27/2017

26665

- TTORSEQ

by:


Item arrived nice heavy duty brackets and hardware supplied Very thick rubber springs. Should install very easy 116038


Comments

Install was a breeze. Its been a year and I can definitely say they make a difference. I used to go over some deep pot holes or a deep depression in road surface and my teeth would jar. Now when this happens no bad reaction as before install.Very happy with them.

Buddy - 02/07/2015

9342

- TTORSEQ

by:

2011 Lexus GX 460


Product came securely packaged and complete and quick. Took about 45 mins to install. I bought this to try to reduce the 3 1/2 inch sag at the hitch of my Lexus GX460. It did that well. I now only sag 2 inches that I feel is acceptable. The trailer has about 484 lbs weight. The ride doesn't seem affected and towing bounce(porpoising) is gone. Thank you etrailer. 560925



- TTORSEQ

by:

2006 Toyota Sequoia


I’ve had these for a year on my 2006 Toyota Sequoia. Purchased them after taking my wife’s horse on a long road trip where we damaged the trailer jack on our horse trailer. The Toyota has a sport suspension and would bottom out when we hit big bumps. These keep it from bottoming out and also help prevent trailer sway. Affordable and very easy to install. Unlike sway bar nothing to hook up when towing and it doesn’t change how the vehicle drives. Completely satisfied! 565135



- TTORSEQ

by:

2011 Lexus GX 460


Works well for intended use. 553868



- TTORSEQ

by:


Must have for a 4runnet Much more stable towing or with heavy loads in back Quick Lane changes safer 524702



- TTORSEQ

by:

2007 Toyota Sequoia


Fantastic! I'm towing a 26' Springdale trailer at just under 6000#. Straight down the highway!! I use load stabilizers and sway control, but I have ultimate confidence in these bump stops!! 489857



- TTORSEQ

by:

2001 Toyota Sequoia


My review is on the ordering and installation only as I haven't hooked up my boat to test them out yet. Ordering and deliver was easy/fast and the installation was a piece of cake - probably 10 minutes total for both sides. Seems like good quality too. 488906



- TTORSEQ

by:

Lexus GS 460


Purchased for Lexus GX460. Solves rear sag problem when towing with medium to heavy trailers. I don’t notice any difference in the ride when not towing a trailer with the helper springs. Should really come standard with the vehicle I’m the first place in order to utilize the towing capacity. I would highly recommend this cheap fix. 468046



- TTORSEQ

by:


Piece of cake to install, has no effect on normal ride (which is good). It's too soon for me to give any meaningful feedback re use when vehicle is loaded but everything is positive so far and I can definitely see how they would help under heavy loads. Compared to the standard bump stops these are almost twice the height so the axle will definitely hit these before they would've hit the OE version and give the heavy duty nature of these, combined with the "hollow" design I can envision how they'll add to the stability of the suspension under max loads. 450768



- TTORSEQ

by:

2012 Toyota 4Runner


This product performed exactly as advertised. Shipping was fast and etrailer.com does a wonderful job of servicing their customers! 364689



- TTORSEQ

by:

2003 Toyota Sequoia


Stopped the rear end sag when travel trailer was hooked up to my 2003 Sequoia. Easy install. Great customer service as always from E trailer 346417



- TTORSEQ

by:

2010 Lexus GX 460


Received the product quickly and proceeded to install the next day. Removing the existing rubber block was simple, but when I assembled the rubber suspension enhancers, I thought that the bolts had bottomed out before they were tight against the mounting plate. I called etrailer's help line and they suggested that I try mounting them and then tightening the bolt. I did not have the room to do this on the suv, so I "mounted" the plate to my work bench and with a lot of force, the enhancers tightened up perfectly. I believe that this is done to keep the bolts from loosening over time. The rest of the install went great and a test ride confirmed that things were installed correctly. 304790



- TTORSEQ

by:

2004 Ford Five Hundred


This product is everything it is advertised to be and more. I needed to transport a 380 pound ALS wheelchair to the VA for an evaluation. A 450 mile round trip. With a total hitch weight at almost 500 pounds with the carrier and the chair, my little stock 2004 4x4 4-runner was not up to the task. I just happened to see your product doing a search for suspension products and felt it may work for me. It is perfect!!!! Kept the rear from sagging, felt great over the bumps and keeps the natural suspension feel even with all the extra weight on the back. They are very simple to install and a perfect addition to my suspension. It will stay for the life of my vehicle...Thanks 3-3-2016 239325



- TTORSEQ

by:

2015 Toyota 4Runner


works good.....install was a nobrainer. ... 232694



- TTORSEQ

by:


Products arrived timely. They appear to be as advertised. Have not been able to install or use them yet. Great Service!! 202714



- TTORSEQ

by:

2012 Toyota 4Runner


Stiffened the rear of my 2012 Toyota Forerunner the perfect amount. Pulling a aluminum car hauler with a 3500lb car. These removed all sag! Harder to remove my wheels than to install the system. 174946



- TTORSEQ

by:

2004 Toyota Sequoia


Easy install on an '04 Sequoia. Suspension is 10x better with these pulling our boat! No more of that Toyota sag when pulling either. Awesome product!! 132829


Comments

A year later and Im still loving this product!

Nick F - 05/27/2015

12067

- TTORSEQ

by:


Easy install Does what it claims 122822



- TTORSEQ

by:


The product seems well built and installation was easy. They did not line up centered over the axle even at the end of the adjustment slots. Not sure how that will effect performance when my Cruiser is loaded. 93831



- TTORSEQ

by:

2011 Toyota 4Runner


Received the product promptly. Exactly what I needed .... decided on this instead of air bags since I only tow a boat. 37180



- TTORSEQ

by:

2004 Toyota Sequoia


Great on a 2004 Toyota Sequoia. Easy install and great feel when loaded and under pressure pulling my 6000 lb travel trailer. No suspension difference at all when unloaded. Excellent product. 15206



- TDR2500D

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Best thing I ever bought for RVing. Before, just hitting a bump in the road would start my truck/camper combo rocking. Now, one rock then steady! My wife is no longer afraid we will careen off the road out of control. 452990


Comments

STILL GREAT! Been on 2 road trips totaling 35,000 miles, to include The Dalton Highway to the North Slope and Deadhorse and across the plains states at 90 MPH and they have worked beautifully. Best investment I have made for my truck. P.S. Have a truck camper so all the weight is on the truck, not just the tongue weight.

John - 11/21/2018

45919

- TGMRCK25D

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I installed them on my truck yesterday. Very simple to put in. Won't be able to see how well they work until I hook up our 5th wheel next for a trip. 576508



- TFR1504E

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Rear suspension pads work great. Ride is still like factory with no load unless driving over a big bump at high speed. When towing a 32 foot travel trailer the sag in back end of truck is greatly reduced with a lot more control. Easy to install. The downside is when truck is full with passengers and not towing anything the added weight makes the ride rougher. Shipped on time. 575558



- TFR350SDF

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Great product and installs easily. I did not use the spacer, so this allows the stock suspension about 1-1/2" of travel before contacting the Timbren units. I tow a 16K fifth wheel and the Timbren's handle this load very well. You can see the compression marking on the lower side of the Timbren when the trailer is hooked up to the truck. Just enough contact to keep the truck at a level stance. My stock "bump stops" were starting to fall apart from age and wear/tear. These Timbrens now add an extra level of suspension that makes the truck feel much more in control when pulling the fifth wheel. 574936



- TDVRRT

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I have a 2013 Chrysler Town &Country that I load down with a roof and a rear rack storage. I was having issues with the rear sitting so low that I couldn't see the top of the rear tires and would occasionally bottom out. Now that these Timbrins have been installed I lose about 3/4 of an inch ride height compared to the 3+ inches I was losing before. It's still a little too early to determine if I'm completely satisfied, so I'll try to provide an update after traveling from Houston to Michigan and back during the holidays. The ride is definitely more firm(when loaded down with the extra storage), which is to be expected, but wouldn't call it jarring. The wife and kids will let me know soon enough. ;) One thing to note about the installation video linked by etrailer in regards to these Chrysler/Dodge minivans... I don't have access to a full vehicle lift, so I had to use a coil spring compressor to pull the coil springs, which is not a big deal because they can be rented(for free with some places) from your local auto parts store. But, they don't just pull out like the video suggests. Also, as others have recommended, disconnect the shock from the bottom, NOT the top. I'm not a mechanic, but not a complete novice. I experienced a few hiccups from following the etrailer video, but was able to work them out with the right tools and patience. 459059


Comments

One year update: We have taken two lengthy1000+ mile road trips in our 2013 Chrysler Town & Country with roof and rear rack storage and all we can say is the Timbren suspension upgrade is simply awesome. Our van no longer sags in the rear when loaded down and the suspension changes are practically unnoticed, especially when the van is not loaded at all. I highly recommend this suspension upgrade to anyone who plans on towing or loading up their Town & Country with extra weight.

Jason J - 12/10/2018

46563

- TDVR05096

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Work great on my 2017 Nissan NV200, easy installment 574777



- TDR1500DQ

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


This is an outstanding product when I have the trailer hooked up! Truck rides like a buckboard when I don’t. For the price and what it does when towing it’s an acceptable trade off to me. 575179



- TFR1504E

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Product works great, 100% better when I’m towing. I have absolutely no complaints about the product. The only issue I had was the package was short 2 washers that the instructions called for. I didn’t contact the company, because I have Spare washers and it was a lot easier to use what I have versus contacting them. 574500



- TFR350SDF

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


My 2015 F-350 dually would always squat when I’d hook up my fifth wheel. Towed it for the first time since purchase and install and the truck is nice and level. The ride is better also and after driving a bit without the camper I don’t really notice them. I love the simplicity of these over airbags and imagine they won’t be needing any maintenance or replacement anytime soon. Great simple solution. Not so easy for an old fat guy to install laying under the truck in the driveway but I managed! 442491


Comments

They work. It is nice towing nice and level now. The ride with the load on is good and smooth and very stable. I am still very happy I went them. Put them on and forget about them, no maintenance and no worries.

John R - 10/13/2018

44594

- TDR1500DQ

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Great product 576580



- TGMRH2

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Fit like a glove. Very good rear support 576063



- TFR250SDG

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


After one year the Timbren Rear Suspension Enhancement System has performed as advertised. My 2016 F-250 does NOT squat with the fifth wheel trailer attached and the ride quality with trailer attached has also improved. Springs arrived quickly and took about 30-40 minutes to install. Excellent Product for towing!!! 449153


Comments

Product is in the third year of service and has performed flawlessly. Just a warning to everyone CHECK THE BOLTS!!!! I found one of them loose and vibrating while doing a pre-trip check!!

Patrick G - 11/05/2018

45403

- TGMRG25C

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Rough ride when not loaded but no more sag in the rear. Does the job! 574802



- TDF25004E

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Was really worried how well these would work compared to a leveling kit for my truck. I have a 2017 Ram 2500 crew cab, 6.4. I put a western wide out on it to plow with and was really disappointed with the truck springs as I had almost 3" of squat. So I was in a toss up, leveling kit or these. I bought the timbren just to try cause I have never used them before, all I can say is I'm very happy with my purchase, now I only get about 1/4-1/2" of squat and the truck rides awesome with the plow on. With the plow off it is noticeably a bumpier ride but I wanted the front end stuffed for plowing and got exactly what I was looking for. Should also mention I had 900lbs ballast in the bed before the install, I only have 420lbs now. World of difference! 583814



- TFR350SDJ

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


They have performed as described. When hooked to my gooseneck trailer truck squat is minimal, and best part is hassle free install and forget. I have been driving empty and unhooked without any notice to ride difference unless I hit a bad pothole. I would recommend them to anyone looking into option of airbags. 573990



- TGMFK15A

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Worked as advertised. Put on the front of my plow truck and it carried the extra weight fine. Easy insulation, would definitely add rear support if the need arises. 316895



- TTOFTUN4

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


These are an awesome suspension up grade. Great for beefing up a half ton. I installed front and rear timbrens on my 02 tundra and im carrying 2000 lbs. Level, no suspension sag and have had 2800 lbs on still handled ok with no droop. Down side is they ride really rough if you do alot of dirt road / off-road driving. I don't recommend those load weiights with 6 ply tires move up to 10 ply. 573504



- TGMFK35C

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Fast shipping fit perfect worked as exp ected 575535



- TFR250SDJ

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


You guys are great to work with. Thanks again 573793



- TFRTT1504E

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Great Product. Easy install 399499



- TDVR05096

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


As advertised was easy to install. Works great. 573079


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  • Recommended Rear Suspension System For 2013 Toyota 4Runner For Towing And Off-Road Use
  • If you are planning on off-road travel with your 4Runner, I recommend the Timbren Active Off-Road Bumpstops, part # TABSTORSEQ. These are designed to cushion the ride of your truck and absorb the shock when bottoming out when you are off-road as you said or when there is a load on the rear of your truck. When you install the Timbrens, the instructions state you want between 1/2 to 1-1/2 inches of clearance between the rubber spring and the contact point on your truck. This means you...
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  • Recommended Suspension Enhancements for a 2016 Toyota 4Runner TRD
  • Yes, the Timbren Rear Suspension Enhancement System part # TTORSEQ will fit your 2016 Toyota 4Runner TRD. I called my contact at Timbren to confirm this. I also recommend the Timbren 1/2" Spacer For Raised Frame Vehicles part # TA25722-90F00 to offset the lift on the TRD models. The Firestone Coil-Rite Air Helper Springs part # F4135 will also work with your 2016 Toyota 4Runner TRD. The main difference between these and the jounce springs is that they are adjustable which means you can...
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  • Improving Ride Quality on a 2015 Lexus GX 460 Towing a Trailer on Rough Roads
  • Using Timbren helper springs on your 2015 Lexus GX 460 will improve the ride quality on those rough roads. It may not completely eliminate everything but it will be a vast improvement. What is likely happening is the weight of the trailer is pulling down on the vehicle and compressing the factory suspension so that there isn't as much space for it to travel up and down. Hit a bump and it will bottom out sooner. For front help springs I recommend # TTOFTAC4A and for the rear # TTORSEQ. Another...
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  • Rear Helper Springs for a 2014 Lexus GX 460
  • The 3,000 pound capacity of the Timbren springs # TTORSEQ is the capacity of the system or, in other words, the amount of weight pushing straight down on them that they can handle. So if you put 2,000 pounds of stuff over the rear axle of your 2014 Lexus GX 460 the springs would still have capacity to spare. Of course you wouldn't put that much weight in the vehicle but that is just an extreme example. If you towed a trailer that weighed 6,500 pounds the tongue weight would be in the...
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  • Suspension Enhancement for 2018 Toyota 4Runner to Reduce Towing Sag
  • You'll have to check the owners manual of your 2018 Toyota 4Runner to determine if it is rated for use with a weight distribution system. Or it can be listed on the hitch as well. You'll see two sets of towing capacities most likely there. One as "weight carrying" and one with "weight distribution. Otherwise you'd want to look into suspension enhancement like the Timbren kit part # TTORSEQ which is a confirmed fit for your vehicle and will give you additional rear suspension support...
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  • Helper Spring Suspension Options for 2006 Toyota 4Runner
  • Since you don't continually carry loads in your cargo area, I'd recommend the Timbren # TTORSEQ aeon springs. The Timbren springs don't have any effect on ride until the extra weight is added to the rear of your vehicle. As more weight is added, the springs will get stiffer. The springs will not increase the cargo capacity of your vehicle, but they will help level our your ride height when you're carrying the heavy equipment around. Air suspension systems like # F4135 are great, but...
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  • Timbren Front & Rear Bumpstop Options for 2007 Toyota FJ Cruiser 4x4
  • The Expert Answer that you are referring to is for a 2012 Toyota Tundra 4x4. The 2012 Tundra has different rear bumpstops than your 2007 FJ Cruiser 4x4. The part # TABSTORSEQ that fits your Cruiser will not fit on the Tundra. Timbren offers a few different options for you to add some suspension enhancement for your Cruiser and it all depends on how you plan on using it. The Rear Off-Road Bumpstops # TABSTORSEQ are rated for 6,000 lbs whereas the Timbren Rear Suspension Enhancement System...
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  • Solution for Reducing Rear Sag on Off-Road Toyota 4Runner with Trailer Connected
  • The only suspension enhancement product available that is confirmed to fit the rear axle of your 2017 Toyota 4Runner is the Timbren Rear Suspension Enhancement System # TTORSEQ. These jounce-style springs will do a nice job of reducing rear sag on your vehicle, however they likely aren't the best solution for your particular application. This is because jounce-style springs like these are going to reduce the space between the axle and rubber stops, which means you will certainly feel them...
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  • Brake Controller Recommendation for a 2001 Lexus LX 470 with 4-Way
  • The P3 Brake Controller part # 90195 is an excellent choice for a brake controller so you are off to a great start. To convert the 4-way to a 7-way so that you can install a brake controller all you would need is the part # ETBC7. This comes with everything needed so you would not need the other components you referenced. I attached an install video plus installation instructions for you to check out as well.
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  • Solution for Timbren System that is Spaced too Far Away from Vehicle Axle
  • Timbren likes to recommend 1 inch between the axle and the Timbren when the truck is unloaded. We have found that this works the best. What you would need then is a 1 inch spacer part # A25723-90AH00 and a new longer bolt that you would have to source elsewhere and your Timbren would be properly setup on your vehicle. The spring being just slightly off-center like yours would not be a problem either.
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  • Will Timbren Suspension Enhancement Improve Ride On 2012 Toyota 4Runner When Empty
  • Installing a suspension enhancement system like the Timbren Vehicle Suspension, part # TTORSEQ will not affect the ride of your 2012 Toyota 4Runner when empty. The system is designed to help the ride when a heavy load is placed in your vehicle. It will work independently side-to-side to help compensate uneven loads and takes the majority of the bumps when traveling on rough roads, while reducing body roll on turns. I am not aware of a system that will lower your 4Runner. You will...
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  • Will Timbren Suspension Help Level a 2007 Toyota FJ Cruiser That Has More Weight on Passenger Side
  • The Timbren suspension enhancement will replace the axle bump stops on your 2007 Toyota FJ Cruiser. They will work independently front and rear, and side to side. So, when you are carrying a heavier load on the passenger side of the vehicle it will compress the hollow rubber spring and become more rigid as the load is applied. This will help keep the vehicle from leaning heavily to that side. It will not affect the empty ride of your FJ Cruiser. The Timbren suspension has a weight capacity...
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  • Timbren Suspension Enhancement for a 2011 Toyota FJ-Cruiser Trail Edition
  • Adding suspension enhancement like Timbrens will help with sag and increase stability and ride quality. If your 2011 Toyota FJ Cruiser is a 4-wheel drive model, for the front you can use # TTOFTAC4A that you have referenced. There is no option for the front if it is a 2-wheel drive model. For the rear if it is 2- or 4-wheel drive use # TTORSEQ. I have included links to the instructions for both sets for you to view. I have also included a link to our FAQ article on Timbren suspension...
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  • Compatibility of Daystar 3/2 Leveling Kit with Timbren Spring # TTORSEQ in 2004 Toyota 4Runner 4WD
  • The Timbren Rear Suspension Jounce Spring System # TTORSEQ, like all such suspension enhancement kits, is intended to be installed on a vehicle whose OEM suspension components are still in good working order. An aftermarket product like the Timbrens, good as they are, do not have the ability to correct for the sag from worn-out springs. They are intended to provide additional support to a functional suspension that is under load. According to the Daystar website the rear leveling kit...
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  • Weight Distribution Recommendation for 2016 LXE Aliner
  • If you think your tongue weight will be at least 250 lbs the Fastway e2 Weight Distribution # FA92-00-0600 will work great. It sounds like you are really close if not over the figure. It's hard to come up with a WD system for a lower rated setup though. Most applications with that low of a tongue weight either have hitches not rated for WD systems or the WD system just isn't needed. To install a ball you'll need a thin walled socket like # ALL643216. For a 2 inch ball you would want...
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  • Can Timbren System be Used With Weight Distribution on 2007 Toyota 4Runner
  • With a properly rated weight distribution system that is properly set up you should not need a Timbren. If you are still getting sag then one of three things is happening. Either you are just exceeding the towing capacity of your vehicle which is why the WDH hitch can't keep up, your system is rated too low, or you don't have enough spring bar tension. That being said a Timbren kit part # TTORSEQ is a fit for your 2007 Toyota 4Runner and would give you additional suspension support....
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  • Suspension Enhancement Recommendation for 2009 Toyota 4Runner
  • We have to recommend you check with a Toyota dealer and see what they think. If they say the vehicle can't be used with weight distribution regardless of the hitch used then there's no way to accomplish what you are trying to do. Best option we have now that we know will work great is the Timbren kit part # TTORSEQ which is a confirmed fit for your vehicle and will provide quite a bit of suspension support. I attached an install video for this for you to check out as well.
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  • Rear Helper Springs for a 2006 Toyota 4Runner with 1 Inch Rear Lift Kit
  • If you are getting a lift kit on your 2006 Toyota 4Runner then air bags that fit inside the coil springs are not going to work. There are no spacers to make up for the additional space created by the lift kit for the coil spring air bags. The exception is if you were to have a body lift instead of a suspension lift since in that case there would not be any extra space. There are spacers available for the Timbren systems though so I recommend going with # TTORSEQ. If the lift kit does...
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  • Can a Weight Distribution System be Used on a Boat Trailer With a Breakaway Tongue
  • Unfortunately a weight distribution system cannot be used on a trailer with a breakaway tongue. The breakaway style tongue cannot handle the additional pressure that is applied to the tongue by the weight distribution system when distributing weight and controlling trailer sway. If you are having trouble with the rear of your 1999 Toyota Land Cruiser sagging when towing your boat trailer, then you may be interested in the Timbren Rear Suspension Enhancement System, # TTORSEQ. I have...
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  • Is Weight Capacity of Timbren Springs for 2012 Toyota 4Runner for the Gross Trailer Weight
  • The capacity rating on Timbren springs such as # TABSTORSEQ or # TTORSEQ for your 2012 Toyota 4Runner is the vertical load capacity of the springs as a set. So in other words it is how much weight pushing down on them they can handle. In either case they are rated for far more weight than the tongue weight capacity of the vehicle itself . . . unless you plan on towing a 30,000 to 60,000 pound trailer! (Please don't attempt to tow a 30K to 60K pound trailer.) Given the weight of your...
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  • Suspension Enhancement Options for 2006 Toyota Land Cruiser
  • We do offer a range of suspension enhancement kits for your 2006 Toyota Land Cruiser (if it is 4WD) and all can be seen using the link provided. The available options include rubber jounce springs and also adjustable air springs. Advantages of rubber springs include easier installation, zero maintenance and a normal ride when the vehicle is not carrying a heavy load or towing. Air springs offer adjust-ability to suit uneven loads but take a bit more time to install. The linked articles...
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  • Recommended Suspension Enhancement System For 2004 Toyota 4Runner
  • I recommend installing the Timbren system # TTORSEQ over the Firestone # F4135. Since you said you occasionally tow or carry a maximum of 3,000-lbs, the Timbren system would be a nice option because you do not have to make any adjustments to the system. As more weight is added to the vehicle either from tongue weight when towing or loading the back of the vehicle, the Timbrens will stiffen to provide more support for the load. Using the Firestone system means you will need to adjust...
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  • Suspension Enhancement Recommendation for 2018 Lexus GX 460
  • For your 2018 Lexus GX 460 we do have suspension enhancement available like the Timbren Kit part # TTORSEQ, but we do not have any air bag setups at this time (April 2018). The advantage the Timbrens have is that they don't require any air pressure maintenance and have a simpler install.
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  • Suspension Enhancements for a 2015 Toyota 4Runner with Taller Rear Coil Springs
  • In order to make sure that we get the correct Firestone Coil-Rite Air Helper Springs for you I would need you to take a few measurements. The measurements I would need are the inside diameter of the coil spring as well as inside height while the vehicle is sitting at ride height and the bump stop is removed. Once you obtain this information I would then be able to make sure you get the correct kit. Unfortunately, I wouldn't be able to offer any recommendations without these measurements....
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  • How to Prevent Sag While Towing with a Lifted 2013 Toyota FJ Cruiser
  • As long as you are using the factory coil springs on your 2013 Toyota FJ Cruiser then the 2-1/2" lift kit you have in the rear will not be a problem. If you have a set of taller/stiffer aftermarket coil springs then you would need to test these for yourself as the manufacturer does not test fit with aftermarket coil springs, just the factory ones. If it turns out that you do have aftermarket coil springs and the airbags won't work then we still have an option for you in the Timbren Rear...
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  • Compatibility of Timbren Rubber Jounce Springs # TTORSEQ With Toyota X-REAS Suspension System
  • The X-REAS suspension technology in your 2005 Toyota 4Runner links the front and rear shock's compression chambers to help dampen overall suspension motion as well as diagonal pitch and roll. Addition of a set of Timbren jounce springs # TTORSEQ will provide rear axle load support but these do not engage unless the vehicle is heavily loaded. A rubber jounce spring does nothing to the ride quality if the vehicle is unloaded. This is one of their key advantages: unless you need them they...
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Info for this part was:

Photos by:
Theodore B
Expert Research:
Michael H
Expert Research:
Jameson C
Video by:
Joshua S
Test Fit:
Nicholas E
Video Edited:
Jacob T
Expert Research:
Adam R
Video Edited:
Dustin K
Installed by:
Cole B
Expert Research:
Jeffrey L
Video Edited:
Chris R
Updated by:
Mary E
Video by:
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Test Fit:
Robert C

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