1. Vehicle Suspension
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Timbren Rear Suspension Enhancement System

Timbren Rear Suspension Enhancement System

Item # TGMRTT35S
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Retail:$391.88
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Vehicle Suspension

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Timbren Rear Axle Suspension Enhancement - TGMRTT35S
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8,000-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. Lowest Prices for the best vehicle suspension from Timbren. Timbren Rear Suspension Enhancement System part number TGMRTT35S can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Timbren Vehicle Suspension - TGMRTT35S

  • Timbren
  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Extra Heavy Duty

8,000-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.


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 vehicle
    • Becomes more rigid as more weight is added
      • Increases stability - providing great performance while hauling heavy loads
      • Reduces vehicle 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 vehicle's suspension


Specs:

  • Includes 2 Aeon hollow rubber springs, vehicle-specific brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required
  • Capacity: 8,000 lbs
    • Do not exceed the vehicle's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Limited lifetime warranty - satisfaction guarantee


An example of sag on a truck's rear axle under a heavy load. The Timbren Suspension Enhancement System levels the vehicle.

Whether you're hauling heavy loads in the cargo area or by pulling a trailer, you will often see the rear sag while the front end rises. In these cases, the rear axle is handling not only the weight of the cargo, but more of the truck's weight, as well. 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 has a custom-fit bracket that will be bolted onto each frame rail above the rear axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down to where the bottom of the spring sits, one inch 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.


Animation 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 the truck level.


Timbren suspension system works to prevent body roll

Each hollow rubber spring works independently to support the driver's or passenger's side of your vehicle. 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.


An example of a trailers swaying

Because the 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 the truck. This also works to make the sway subside more quickly.


An empty truck on a bumpy road without Timbren

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.


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.



GMRTT35S - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TGMRTT35S Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Timbren Rear Suspension Enhancement System - TGMRTT35S

Average Customer Rating:  4.7 out of 5 stars   (2323 Customer Reviews)

8,000-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.

- TGMRTT35S
by:

Bolted in like a factory part, i didnt require the entra spacers. No change in unloaded ride quality, but with 3000# in the bed the truck felt more stable. Im am very happy with it so far. 463532



- TGMRTT35S
by:
2006 Chevrolet Silverado

This review is on a timbren air spring ,I bought this on a Saturday night ,went out of town Monday morning and got in on Thursday afternoon ,wife said the box had arrived Tuesday and put them on this morning on our 2006 Chevy k-3500 ,my guy had the truck in our shop for an oil change and I asked him to put it on, came back 45 min later and he was done with the spring installation and the oil change ! I asked him how hard it was and he said it took him longer to figure out which parts in the kit he needed that the actual install ,said it was about as easy as it gets .Well ,now for the test drive we drove the truck empty ,pretty much as stock ,rode real well.Then we put a Gaylord box that weighed 4506# and drove the truck ,WoW ,What a difference ,truck rode great and handled well ,went over railroad tracks,really handled well and rode great ,I wish I'd have done this years ago ! I highly recommend this product and commend etrailer on their good service and what made me decide to purchase the timbren product was the you-tube video ,after I saw that ,I placed the order ,it looked so simple to install and it went on just like on you-tube 283142


Comments
The air springs have performed flawlessly ,very pleased with the product and performance ! As a matter fact I was recommending this product to a friend the other day.
Bryan L - 12/11/2017

31735

- TGMRTT35S
by:

Thank you kim, cant wait to install in my truck. Have a great holiday. Jim 592430



- TGMRTT35S
by:
Chevrolet Silverado 2500

So far everything I have purchased from etrailer for my HD 2500 has worked as described. 399243



- TGMRCK25D
by:

Review from a similar Aeon Spring System in Vehicle Suspension


After a 3000 mile trip with a 42' fifth wheel on a 2016 Chevrolet single rear wheel short bed 3500HD, I will say they made a difference. They took some of the bounce and the side to side rocking out of the truck. I would definitely put them on my next truck as well. 667565


Comments
Still good. The right solution is a dually with heavier springs and more stability from 4 tires, but that is not in the budget.
Paul - 07/08/2020

86349

- TDVR05096
by:

Review from a similar Aeon Spring System in Vehicle Suspension


I carry 1400 pounds of tools and supplies in my NV200. These helped carry the load, along with heavier shocks. Very happy! 691745



- TGMRCK25D
by:

Review from a similar Aeon Spring System in Vehicle Suspension


this is the second set of Timbren springs I have purchased, the first set was on my Ford Raptor, they took all of the sag and sway out of pulling my boat. I have this set on my 2015 GMC Denali 2500HD, I pull a 42 ft. 5th wheel and the Timbren's take all of the sag and sway out, these are in my opinion the best product I have purchased for my truck. 683687


Comments
this is still an amazing product! works as good today as the day I installed it. I recommend this to all my friends.
John G - 08/12/2020

97151

- TDVRRT
by:

Review from a similar Aeon Spring System in Vehicle Suspension


Installed this on my 2009 Caravan because when I had a hitch mount 4-bike platform rack hanging off the back and was loaded with camping gear and family, the rear suspension was terrible, it would bottom out, and my headlights pointed up so that everyone would flash their brights at me. New shocks helped, but did not solve the problem. This product did fix the problem and I am very happy. I was concerned about the feel when the van us unloaded, but this has not been an issue. I highly recommend this product. 796869



- TGMRCCA
by:

Review from a similar Aeon Spring System in Vehicle Suspension


I had made purchases from etrailer in the past and have always been satisfied with the service and products purchased. During this transaction I purchased Tembren bump stops for my 2019 Chevy Colorado. They dont affect the ride of my truck until I put it undet a load. Then they give me better handling of the truck and less weight taken off of my steering. It was quite an easy install, and they work great! I feel the price could have been a little better, however overall I am very satisfied compared to what it would have cost to install air shocks. Thanks etrailer, another satisfied customer! 665150


Comments
Since purchasing the bump stops from E Trailer I have been hauling a 5000 lb. Travel trailer for about a year. I am very pleased with the ride of the truck under a load. The Tembren bump stops improved things significantly. Thanks E Trailer! Another purchase made from you and a very satisfied customer.
Rodney L - 07/02/2020

84791

- TFRF53A
by:

Review from a similar Aeon Spring System in Vehicle Suspension


Delivery by etrailer was fast. Their advice as to proper application of the Timbrens saved me lots of money! 749745



- TGMRYS4
by:

Review from a similar Aeon Spring System in Vehicle Suspension


So far they look great. I will put on this weekend and see how they work with my travel trailer. 476068



- TFRTT350F
by:

Review from a similar Aeon Spring System in Vehicle Suspension


These arrived as scheduled. The look good, well made. On my way out to install them now. The will get tested later today on the way to the lake. 703241



- TGMRASTBHD
by:

Review from a similar Aeon Spring System in Vehicle Suspension


My van is a 2000 GMC Safari. when pulling my 17 ft. boat it would sag pretty bad. after installing the Timbrens it sits level and isn't bottoming out anymore. Great product and great service from etrailer. The Timbrens went on very easily and the instructions were good. 122042


Comments
Van gave out about 2 months after installed them, didnt notice much difference except van road rougher. It was an older van and might have done better with new shocks.
Dan J - 03/25/2015

10331

With this Timbren System installed you may notice a difference in the ride quality of the van when the Timbren springs are not activated. The benefits of Timbren suspension enhancement systems are designed to provide additional support when there is a load placed on them and on the vehicle suspension.

-- Rachael H - 5/4/2015


- TDR1500DQ
by:

Review from a similar Aeon Spring System in Vehicle Suspension


This was ordered because the truck seemed overloaded with just s few items. I haven't installed it yet but will let you know how it works after I do The shipping and packing were excellent and arrived quickly. 420483


Comments
Working great.
Glenn L - 08/15/2018

42324

- TTORTUN4
by:

Review from a similar Aeon Spring System in Vehicle Suspension


I bought these as a replacement for "air bags" which I had two different sets, which failed over 10 years. i would say this product is helpful with pulling a trailer and lighter loads but from time to time I haul heavier loads and this product doesn't offer as much help/support as the air bags. This product is a little cheaper and if they don't weaken over time they will be a help. I have added additional leaf springs to two different pickups but then you end up with a stiffer ride full time. 421383



- TDR1500DS
by:

Review from a similar Aeon Spring System in Vehicle Suspension


Very happy with my timbrens and quick shipping. Added these to a 2013 2500HD 4X4. Quick and simple to install. improved ride quality and takes the squat out when pulling a gooseneck trailer. Very happy and would recommend to anyone wanting to improve quality of ride height. 493335



- TDR1500DS
by:

Review from a similar Aeon Spring System in Vehicle Suspension


Great product. 597716



- TDR1500DS
by:

Review from a similar Aeon Spring System in Vehicle Suspension


Doesn't get any easier for an install. A jack, some soapy water and a couple pieces of 2x4. In about 5 minutes you're done. Took out almost all sag when I dropped my travel trailer on the ball. Great addition to the suspension. 488109



- TGMFK25S
by:

Review from a similar Aeon Spring System in Vehicle Suspension


I ordered timbrens for the front and rear of my chevy 2500. I have a 2000 lb truck camper and I wanted something to help carry the load a little better. I had no idea that my front bump stops had worn away to almost nothing until I installed these. They have worn well and performed well so far. 628835


Comments
Still working great. No problems. Really happy I didnt waste the money on airbags.
Josh - 04/16/2020

73355

- TFR250SDF
by:

Review from a similar Aeon Spring System in Vehicle Suspension


Fast shipping 400467



- TFR250SDF
by:

Review from a similar Aeon Spring System in Vehicle Suspension


I have a Timbren rear suspension system on my 1982 Chevy truck that I still own, and after 20 years they still work fine. This latest set installed easily on my 2001 F-250 and they work just as well with and without a load. 440182



- TFR250SDG
by:

Review from a similar Aeon Spring System in Vehicle Suspension


I installed these on my 2012 Ford F250 because I have two friends who have them on their trucks and they pull a travel trailer and a fifth wheel camper. I was impressed with the difference it made compared to my truck and camper Parked next to theirs'. I am mechanic and I see no reason why anyone would have trouble installing these them selves. Clean off the Nut and end of bolts before trying to loosen. Spray some WD-40 on the threads. Put on some gloves and use a 15mm wrench to loosen factory nut. Be sure to hold up on the factory bump stop because it has a line up pin that keeps it from turning as you loosen the nut. The driver side is a little more aggravating to get to because of wiring harness but there's plenty of room to use a wrench first then a 3/8" drive rachet and short extension with a good 6point 15mm standard depth socket will speed up removal. Then installing the new parts is a breeze. Just follow directions or etrailer videos on YouTube. Took longer to remove factory bump stomps than to install new ones. Maybe 45 mins total on original ones maybe. Then after preassembly of new ones, it took maybe 20 mins to install completely. Give yourself 1:30 hrs of time and enjoy your truck not sagging around town when loaded. 654107


Comments
I have had zero problems with the Timbrens on my truck. I have pulled our camper and several tag along trailers hauling equipment and parts. They do exactly what they are supposed to. Saves on sag by over an inch. No complaints here.
Lance M - 06/08/2020

79111

- TDR1500DQ
by:

Review from a similar Aeon Spring System in Vehicle Suspension


Have not tested it out yet, but the installation took about 15 minutes by myself, looking forward to trying them out with my 28ft enclosed trailer. You will need a block of wood under them when you let the jack down to seat them in the cups fully there is no way you can snap them in by hand, the video had that great suggestion 199076



- TGMRYS4
by:

Review from a similar Aeon Spring System in Vehicle Suspension


Very satisfied with the results,and the customer service.The first set were. incorrect.After calling etrailer,they got the correct one right out to me. 250319



- TFR250SDJ
by:

Review from a similar Aeon Spring System in Vehicle Suspension


You guys are great to work with. Thanks again 573793


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Ask the Experts about this Timbren Vehicle Suspension

  • Timbren Recommendation for 2008 Chevy Silverado 3500HD Towing Heavy Fifth Wheel
    The Timbren system I would recommend recommend would be the part # TGMRCK35S. It's the lighter duty of the two kits but the heavier duty part # TGMFK25S but it's going to provide a very stiff ride. The # TGMRTT35S still provides the 8,600 lbs of support which will work great. The HD is really needed only in very extreme situations like tow trucks.
    view full answer...
  • Timbren Rear Suspension Enhancement System for a 2003 Chevrolet 2500 HD Silverado
    The correct kit for your 2003 Silverado, 2500 HD with long Bed, is the Timbren Rear Suspension Enhancement System, # TGMRCK25S, which is the correct kit for 2 and 4 wheel drive models. We have a video installation that should be helpful and installation instructions for you to look over, see links. The kit you referred to is designed for 2500 Service vehicles only. Another option for your vehicle is the SumoSprings Custom Helper Springs Kit, # SSR-201, which is a good option if your...
    view full answer...
  • How to Pick Out a Timbren Suspension Enhancement for a 2009 Chevy Silverado 3500
    We have two Timbren fits for your 2009 Chevy Silverado 3500. We have the part # TGMRCK35S which is rated for 8,600 lbs of suspension support and the part # TGMRTT35S which will provide 12,000 lbs of suspension support. Most likely the lighter duty setup would be the ideal system since the heavier duty version is for severe service vehicles like tow trucks that would be at or near capacity most of the time they are being used. You should note that these systems do not allow you to...
    view full answer...
  • Suspension Enhancement for a 2007 Chevy Silverado Classic Towing a 5th Wheel Trailer
    The pin weight of a 5th wheel trailer is typically going to be much less than the 12,000 pounds springs # TGMRTT35S are rated for. So there is really no need for such a high capacity spring set. I recommend Timbren springs # TGMRCK15S rated for 3,600 pounds. This set should not interfere with the 5th wheel install kit because they mount to the bottom of the frame. I have linked a video showing a typical installation and a link to the instructions for you. If you want a little more...
    view full answer...
  • Can Spacer of Timbren kit part # TGMRTT35S be Left Off of Truck
    Try taking the spacer out as it's only designed to make the Timbren kit part # TGMRTT35S contact the vehicle sooner. You should feel it smooth out a little bit but the unloaded ride quality of a 1 ton truck is never going to be super smooth.
    view full answer...
  • Suspension Enhancement for a 2005 Chevy Silverado 2500HD Diesel and Different Trailer Types
    To start, adding a suspension lift on your 2005 Chevy Silverado 2500HD is going to require either a custom suspension enhancement kit or spacers because using a regular suspension enhancement kit on a suspension lifted vehicle would mean the helper springs would not engage when they are supposed to. Adding a lift can also make the towing capacity unknown (most likely lowers it) so I would not recommend it. Considering that you tow different loads the best option would be to go with air...
    view full answer...
  • Can Spacers Be Added To Timbrens for 2009 Chevy Silverado 2500 With Truck Bed Camper
    The correct Timbren Rear Suspension Enhancement System for a 2009 Chevrolet Silverado 2500 when using an in-bed camper is part # TGMRTT35S. This kit is designed to have around 1/2"-1" between the spring and contact point but if you like you can close the distance with the Timbren Spacer For Raised Frame Vehicles part # A25723-90AH00 or part # TA25722-90P00. Please note, you may need to get a longer bolt from a hardware store as well.
    view full answer...
  • Recommended Rear Suspension Enhancement For 2000 GMC 2500 4x4
    If your 2000 GMC 2500 4x4 is a heavy duty C/K Series, the Timbren Rear Suspension Enhancement System # TGMRCK35MA is the confirmed fit. This system is rated for a 10,000 lb capacity. If your 2000 GMC 2500 4x4 is a light duty Sierra, then the Timbren Rear Suspension Enhancement System # TGMRCK25S with a capacity rating of 6,000 lbs is the correct part. The # TGMRTT35S is not a fit for your model year vehicle.
    view full answer...
  • Can Timbren Suspension Enhancement be Used with SuperSprings on a 2007 Chevy Silverado Classic 3500
    The reason why you are not seeing all of that rear sag being taken care of with the SuperSprings Custom Suspension Stabilizer installed is because the part with the highest weight capacity for your 2007 Chevrolet Silverado 3500 is part # SSA245-2. Since this part has a weight capacity of 4,000 lbs it will not be able to help as much as it would if your camper did not weight over 4,000 lbs. The SuperSprings product that you have on your 3500 will not allow some Timbren Suspension enhancement...
    view full answer...
  • Comparing the Timbren Springs and Roadmaster Active for 2004 GMC Sierra 2500HD with In-Bed Camper
    The best option we have for your 2004 GMC Sierra 2500HD with truck bed camper is the Timbren Rear Suspension Enhancement System part # TGMRTT35S. This system is specially designed for vehicles with truck bed campers and will do an excellent job of providing you with both support and stability. The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit part # RAS4611 is not really going to give you enough support and would not be a smart buy for your particular application in my...
    view full answer...
  • Heavy Duty Rear Suspension Enhancement for my 2007 Chevrolet Silverado.
    We have exactly what you are looking for. The Timbren Rear Suspension Enhancement System part # TGMRTT35S will give you 8000 lbs. of load leveling capability. These are a custom fit for your truck and will require no drilling to install them. They use a very high quality material to construct these and they last forever and will not be affected by the salt, gas, oil and other such things it will be coming in contact with. I've linked the instructions for you to check out. This is a...
    view full answer...

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Info for this part was:

Expert Research:
Robert G
Expert Research:
Michael H
Expert Research:
Jameson C
Updated by:
Adele M
Updated by:
Mary E
Video by:
Jonathan Y
Installed by:
Robert C

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