1. Vehicle Suspension
  2. Timbren
  3. Jounce-Style Springs
  4. Standard Duty
  5. Rear Axle Suspension Enhancement
  6. Commercial
Timbren Suspension Enhancement System - Rear Axle

Timbren Suspension Enhancement System - Rear Axle

Item # TFRTT350J
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Retail:$373.22
Our Price: $317.24
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Timbren Standard Duty Vehicle Suspension - TFRTT350J
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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 Suspension Enhancement System - Rear Axle part number TFRTT350J can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (1934)
  • Q & A (26)
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Timbren Vehicle Suspension - TFRTT350J

  • Timbren
  • Jounce-Style Springs
  • Standard Duty
  • Rear Axle Suspension Enhancement
  • Commercial

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
      • Rides just as smoothly when you're not hauling a load
    • Becomes more rigid as more weight is added for a great performance when you're hauling a heavy load
      • Increases stability
      • Reduces vehicle sag
  • Works independently - side-to-side adjustment
    • Helps compensate for off-center loads
    • Reduces body roll when swerving and turning corners
  • Acts as a shock absorber, taking the brunt of bumps and rough roads
    • Extends the life of your vehicle's suspension
  • Includes 2 Aeon hollow rubber springs, custom-fit brackets, and hardware for simple installation
    • Installs directly onto frame
    • No drilling required


Specs:

  • Load-leveling capacity: 8,000 lbs
    • Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.
  • Lifetime warranty
  • Satisfaction guarantee


An example of sag on a vehicle's rear axle under a heavy load

Whether you're hauling heavy loads in your bed or cargo area or you're towing a trailer, you will often see the rear of your vehicle 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 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, 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.


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 your vehicle 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 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 your vehicle. 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.


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.



FRTT350J Timbren SES with Aeon Hollow Rubber Springs - Rear Axle



TFRTT350J Installation InstructionsInstallation Details TFRTT350J Installation instructions

This Product Fits The Following Vehicles

2017 - 2020 Ford F-250 Super Duty 2 Wheel Drive

2017 - 2020 Ford F-350 Super Duty 2 Wheel Drive

2017 - 2020 Ford F-250 Super Duty 4 Wheel Drive

2017 - 2020 Ford F-350 Super Duty 4 Wheel Drive




Video of Timbren Suspension Enhancement System - Rear Axle

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




Video Transcript for Timbren Front and Rear Suspension Enhancement Systems Review

Speaker 1: Today we're going to be taking a look at the Timbren line of suspension enhancement systems. Any time that we add weight to our vehicle, it's going to put a lot of strain and stress on the suspension, especially if we're towing a heavy camper, trailer, or we have a heavy load in the back.Tends to have the back end squat down, which again, it's going to put that strain and stress on the rear suspension because not only are we asking it to hold up the weight of the vehicle, but everything else that we add on to it. Which that can arise a lot of different issues. The front end is going to be getting pulled off, which will misalign our headlights, and our tires won't have as much contact, so our steering and braking is going to be diminished.But tat;s where timbrens are going to come into play. They're going to provide us that extra support so that when we do have those heavy loads, the back end doesn't sag down quite as much, and it's not putting so much stress on the back end. By doing that, the front end's not going to rise up, which means our headlights will be in line and our tires will have the correct amount of contact and pressure, so our braking and steering isn't affected.

And they're going to do that all while making our ride more comfortable with that extra load.Our timbrens are going to provide us the support we need by replacing our factory jump stops and mounting in between the frame and the axle. Now, yours may look different, so you want to double check inaudible 00:01:20 fit guide for your specific application.Now, each one of our timbrens is going to feature a steel bracket. They're all going to have black, powder coat finish on them to resist that rust and corrosion or any other kind of chemicals that may be on the road. They're going to have a hollow, rubber ayon 00:01:36 spring that's going to take a lot of that pressure and strain off of the rear suspension.Whenever we do load our vehicle down, the space between our frame and our axle is going to get smaller. That's where our spring is going to make contact with the axle, and it's going to start compressing.

Now, they are progressively rated, so if we have a small load or a light load, it's going to have a little soft engagement. But the further it gets compressed, the harder and stiffer it becomes, giving us the support we need with those heavy loads.And since they are rubber, they're going to have a lot of give to them, which means they're going to give us the support we need. But at the same time, they're going to give us some more cushion and absorb some of the road shock as we drive. And since the rear ones here aren't in constant contact with our aXle, it is going to provide us the same ride quality when it's unloaded.Our timbrens are going to work independently from each other from side to side. That way, if we have an off center load, it will help compensate for that, but at the same time, if we take an evasive maneuver or a really sharp turn, this is going to help reduce that body roll and some of that sway feeling that we get going on when we have a lot of added weight.Our timbrens for the rear are going to be a good enhancement for any time you're going to be adding weight to the back of your vehicle, whether it be a heavy trailer, a large load in the back or any other situation where you're adding a lot of weight to the back of your vehicle.Now, timbrens on the front are going to be a little bit different.

They're going to provide us that load-leveling support and make sure the front end doesn't get pushed down too far. However, these typically are going to be in contact all the time, which means it's going to give us that support and help reduce on that body roll all the time, all while absorbing that road shock, giving us a smoother ride.Now, some situations where you'd want that extra support on the front of the vehicle to keep it from getting pushed down too much would be if you have a snow plow or winch, if you flat-tow your vehicle, or if you have any other heavy accessory on the front. This is going to make sure that front end stays where it should be, and again, making sure our tires, braking and steering acts how they should.When comparing the timbrens to other suspension enhancement options like airbags, these are going to be a lot easier to install because we're not going to have to worry about running lines, maintaining air pressure, putting in switches or compressors or any of that. Once these are installed, these are going to be completely maintenance free. However, airbags are going to provide us with a lot more adjustability, whereas our timbrens are not going to have that.That'll finish up your look at the timbrens suspension enhancement systems..


Customer Reviews

Timbren Suspension Enhancement System - Rear Axle - TFRTT350J

Average Customer Rating:  4.7 out of 5 stars   (1934 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.

- TFRTT350J
by:
2017 Ford F-250 Super Duty

Both sides in 20 min with air tools. Have 5th wheel (2500 hitch weight) and made the 17 F250 sag a little. This will help. Now my sticking point is price. Feel like I got ripped off seeing these rubber Kong dog toys that I paid Guess no different than paying $50 for under armor $20 sweat pants. OK, complaining over and would I buy them again? Yes with a coupon. 481075



- TFRTT350J
by:
2017 Ford F-350 Super Duty

I wanted to stabilize the minor sway on my 2017 F350 SRW/LB with a 2800 lb camper. I am so glad someone recommended these to me. I was about to spend several hundred dollars on some air-rides (not including installation). These were cheaper in price, require no maintenance or air, and are simple to install yourself. Only took me about 20 minutes per side. They definitely make a difference! I hardly notice the camper is on the truck. And when I'm not hauling my camper, there is no difference in the ride. 739651



- TFRTT350J
by:
2017 Ford F-250 Super Duty

This product was incredibly easy to install on my 2017 Ford F-250 Super Duty. About 10 minutes per side. Far simpler than air bags, which were my original target. Just towed my 35' fifth wheel on some twisty, hilly coastal highway and couldn't be happier. The suspension squat I had before is gone, the trailer felt much more stable and secure and getting my fifth wheel hitch to fully latch was far less of a problem (first time each time). These were a huge upgrade and are worth every penny. Installation is extremely simple. If you're thinking about it, do it! You won't regret it. 681264



- TFRTT350J
by:
2018 Ford F-250 Super Duty

The best. Good web page. Fast shipping. 606688



- TFRTT350J
by:
2017 Toyota Camry

Got to my house when I was told they would. Put these on a 2017 F350 Dually that I turned into a tow truck. Took about 5 minutes to put them on and the truck is completely different when towing. I towed my 2012 F350 before and after and it’s literally a night and day difference. Before, I felt like I was going to skate across the road and now it’s like there’s a little Toyota Camry on the back. I didn’t put the extra inch spacer because I was worried about ride quality, however I think I will in the future just so I feel better. My truck does still squat, however my application is completely different than pulling a normal trailer being that I do have an entire vehicle added directly to my truck’s suspension.Didn’t get any befores of me lifting the exact same vehicles, but it’s definitely different. I probably will add small helper springs later just being that I do constantly have a load as my lift on my truck weighs 1800lbs. alone. 585872



- TFRTT350J
by:
2017 Ford F-350 Super Duty

Great product. Easy to install 518200



- TFRTT350J
by:

The part fit perfect and was installed with no problem installation took 20 minutes The problem was that the part S had sharp burrs from manufacturing and should have been debuted during installation I got 2 cuts on my hand 442315



- TNRTTNA
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Makes a huge difference in carrying heavy loads. I could tell an immediate difference when I had a full bed, gooseneck load, or a bumper pull load. Highly recommended. I considered air suspension, but did not want to tackle that installation. Literally can install this with a torque wrench and impact wrench. 725228



- TDF25004B
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Bought these because I just put a plow on my truck and I didn't want to mess with air bags or heavy duty springs that would raise the front of my truck. These suspension enhansment bumpers are extremely easy to install, fit perfectly and do exactly as they advertise.. couldn't be happier 726518



- TFR1504D
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


This was so easy to install, you DO NOT need to take rear tires off.. 60 Minute install. I went without the additional spacer to allow for a little nicer ride when empty. Very well made 730169



- THROD2
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


The product first arrived in a damaged box with one of the washers missing, but ETrailer did resupply that. The hardest part was finding a shop able (needs the right tools to depress coil springs) and willing (a potential liability issue messing with suspension) to replace it for a reasonable cost. Eventually a local tire shop agreed to. This was for a 2014 Honda Odyssey, especially for pulling a pop-up. Took two camping trips last summer, one before and one after installation, and I have been pleased with the added stiffness in the rear suspension. It made about 1 to 1.5 inch of difference in resting position when fully loaded and towing and has helped smooth out bumps and humps in the road - both when towing and not. 589641


Comments
Took a couple more trips this year, and its all still working good, but I found out there still is a limit to how much weight you can pack on the rear axle. Dont recommend using a double hitch extender for bike rack plus towing because it spans the tongue weight too great of a distance from the van and gets too close to the ground. This is as much a comment on not overloading the suspension as it is on the DrawTite hitch I got on etrailer.
Dan O - 12/11/2019

63761

- TTORTUN4
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I recently ordered and installed this suspension enhancement for my 2017 Nissan Titan SV 2WD, Crew Cab. I will be road testing it next week with a heavy duty 20' flat trailer, carrying a 2,800 lb car, 500 lb 4 wheeler and misc items for an estimated total of near 6.5-7k lbs of trailer weight. In addition, I might be carrying a 450 lb go-kart in the truck bed. I feel this will be a good test of the products' capability and performance. Approximately 2 weeks ago, I towed an 8.5' x 20' cargo trailer weighing out at nearly 9k lbs on the same 500 mile trip. For that trip, I had the stock suspension setup and used a weight distribution (WD) system. The trip went smoothly, but I'm hoping that this suspension enhancement will eliminate the need to go through the WD hookup process. A followup review to come. I've given this a 5 star review due to the excellent customer service I received from Ashley. I was traveling back down to Florida from up north and had questions regarding compatibility with my truck. She called the company, Timbren, to verify that it would work and answered all my questions, since I was driving at the time. She even pushed the order through quickly and got it out that same day. I was amazed when I received it yesterday, less than 2 days after I ordered it and installed it in less than an hour. This is truly an example of the excellent level of customer care that etrailer provides its patrons and exactly why they are my first choice for all my trailering needs. Thank you. 725798



- TDR1500DS
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Works perfectly, easy install. Will be making another purchase for other trucks now that we were able to see how well they worked. 702944



- TFRTT1504E
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Timbren Suspension Enhancement System - Rear Axle Item # TFRTT1504E Just had a chance to install the Timbren. Went on a short drive with no load and have not hooked up the trailer yet. About an hour to install, the instructions where not very good but going on line etrailer site and followed the video. Very good product! 734943



- TGMRCK25D
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


These are one of the best products ever! Simple, effective and a reasonable price. They are carefree, invisible when unloaded and very easy to install yourself. I tow a 37ft 12,500lb 5th wheel with my 2018 2500HD. Though my truck already handled the load well, these make the ride more stable and controlled. Lifts the rear up about 1.5 inches as well as keeps things centered from left to right. What's most important when towing is keeping the steer axle on the road. Though I recommend them for any towing configuration; for those of you that push the limits, these are a must have. Brilliant product! Thanks Timbren for the magic bullet! 708124



- TDF25004E
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


A nice product that you don’t even noti ce. 620449



- TGMFK25S
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


What a difference made the truck handle better and the front end is so much stronger 727838



- TFR1504D
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


The product works as described but when I'm driving empty on any road that may be rough my truck tends to bottom out on the jounces causing a rough ride 692250



- TFR1504D
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


These work as advertised and do a great job of preventing the back end of the truck from dropping too low when hauling or towing. When pulling our 8000# trailer the truck ride is relatively level. I would prefer they were maybe a 1/2" to 1" shorter so the unloaded suspension would have a bit more travel. With a cap on the truck there is less than a couple of inches of travel before the stops are hit and it does make the ride more harsh. I knew this would be an issue with these. They are considerably less costly than airbags with zero maintenance concerns. 611406



- TFR350SDF
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Towing our 15 thousand pound fifth wheel is way better since i installed these. Highly recommend over the the ride. Easy install. Fuctional affordable. Great product 500554



- TGMFK25S
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Little bit rougher ride but worth it in Plow holding capability when traveling. It's nice to not have the front end squatting so much. Excellent product will definitely be purchasing again when I get a new truck. 592581



- TTORSEQ
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I am dealing with Timbren. The washer for mounting the rubber spring to the mounting plate clearance hole is too small for the bolt diameter. The washer is not something you can get out without damaging in my opinion. The bolt also will not thread completely into the mounting plate because of poor threads ( not tapped correctly). Galling of bolt if you try to tighten. Very poor QC or inspection at Timbren or wherever. Once again, working eith Timbren on this. Maybe you should check you kits at etrailer!! 704185


Comments
I pulled the kits we have in stock and they check out fine. The washer inside the spring had the same diameter as the spring for the bolt. Could you send in a photo of your kit?
-- Victoria B - 09/25/2019

61509

- TDF25004B
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I have a very heavy "Cattle Guard" on the front of my RAM 3500 and this combined with the heavy 4WD and diesel engine the extra support from the Timbren Front Suspension Enhancement System definitely keeps the front suspension from bottoming out. 644652



- TDRTT3500D
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I installed this kit in about a half hour. So simple and easy. Towed my Montana fifth wheel and my truck sat perfectly level. I was going to install a rear sway bar kit but dont need to now. Etrailer got me this kit fast and on time. Awsome company to do business with. Thank you etrailer. 566432



- TDF25004B
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Great product and works as it should. It is easier to install with 2 people than it is with one. One working the jack and one holding the unit in place. 572879


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Ask the Experts about this Timbren Vehicle Suspension

  • Timbren Rear Suspension Enhancement System Compatible with 2017 Ford F-350 Super Duty
    First of all, thank you for your service. Unfortunately at this time we don't offer a military discount, but we do have free shipping most of the time on orders like this one. To confirm your fit, we have two sets of jounce springs available from Timbren that are confirmed to fit your 2017 Ford F-350 Super Duty. The Timbren Suspension Enhancement System - Rear Axle # TFRTT350J with a weight rating of 8,000 lbs and the # TFR350SDJ rated for 8,600 lbs. These springs will have a slightly...
    view full answer...
  • Which Timbren Suspension Kit for 2017 Ford F-250
    There are 2 Timbren helper spring kits for the 2017 Ford F-250. First we have # TFR250SDJ which has an 8,600 pound capacity and fits 2- and 4-wheel drive models. And second we have # TFRTT350J which is rated for 8,000 pounds and also fits 2- and 4-wheel drive models. The higher weight capacity and the fact it's not as popular as the lower rated kit is why there is a price difference. I prefer to recommend the lower capacity kit as it will give you a smoother unloaded ride quality.
    view full answer...
  • Height of Timbren Helper Springs for a 2017 Ford F-250
    There are actually just 2 Timbren helper spring kits for the 2017 Ford F-250. First we have # TFR250SDJ which has an 8,600 pound capacity and fits 2- and 4-wheel drive models. And second we have # TFRTT350J which is rated for 8,000 pounds and also fits 2- and 4-wheel drive models. So each of those part numbers appears twice because of the 2-wheel drive and 4-wheel drive categories. The springs in kit # TFR250SDJ are 4-1/2 inches tall and for kit # TFRTT350J they are 3-9/16 inches tall....
    view full answer...
  • Are Timbren Spacers Required for a Leveling Kit on a 2017 Ford F-350
    Generally speaking, most leveling kits lift the front of the truck 1-2" to match the rear as the factory ride height on most pickup trucks nowadays is about 2" lower in the front than in the rear. This is usually to compensate for squatting while towing with a trailer. As long as the rear of the truck is not lifted then you will not need to use a spacer when installing the Timbren Suspension Enhancement System part # TFRTT350J on your 2017 Ford F-350. However, if the the leveling kit...
    view full answer...
  • What is the Height of the Timbren Jounce-Style Springs for a 2019 Ford F-250
    The Timbren Jounce-Style Springs # TFR250SDJ for standard duty use on a 2019 Ford F-250 measure 6-7/8" fully assembled. The spring is 4-1/2" tall and the bracket is 2-3/8" tall. The Timbren # TFRTT350J for heavy duty (Severe Service Vehicle) applications measures 7" tall altogether. The spring is 3-5/8" tall and it comes with a 1" spacer and the same 2-3/8" tall bracket.
    view full answer...
  • Best Timbren Suspension Enhancement for 2019 Ford F-350 Super Duty Towing Camper Trailer
    The best Timbren Suspension Enhancement System fory our 2019 Ford F-350 is the Timbren # TFR350SDJ which are designed with recreational towing in mind, as opposed to the kits which are meant to be used with more heavy-duty work trucks. The Timbren # TFR350SDJ that fit your '19 F-350 are double-convoluted, which means they have more cushioning and give than the single-convoluted Timbrens like # TFRTT350J. This suspension enhancement system is going to improve the handling of your...
    view full answer...
  • Comparing Timbren Suspension Kits for 2019 Ford F-350
    For the rear suspension of your 2019 Ford F-350 there are two different Timbren suspension kits available. The heavy duty version part # TFRTT350J and the lighter duty # TFR350SDJ. The HD version is basically for severe duty applications like tow trucks or other applications where the truck will be basically at capacity at all times. If your application is more like recreational towing and wouldn't be at the capacity all the time the lighter duty option is the way to go.
    view full answer...
  • Suspension Enhancement Recommendation for 2017 Ford F-350
    I'd first make sure you aren't exceeding the capacity of your truck as 4 inches of squat for a 1 ton truck is quite a bit. Assuming you are within the capacities of your vehicle your best option is to use suspension enhancement to bring the rear suspension. Changing the ride height makes suspension enhancement installs more complicated and then it also makes towing the trailer level with enough bed rails clearance difficult too. Air suspension would be your best option since it will...
    view full answer...
  • Correct Timbren Rear Suspension Enhancement System For a 2020 Ford F-350 Super Duty
    The correct Timbren Rear Suspension Enhancement System for a 2020 Ford F-350 Super Duty is part # TFR350SDJ which works on both 2WD and 4WD models. The Timbren Suspension Enhancement System part # TFRTT350J is for models with constant loads like service bodies or truck bed campers therefore, not ideal for towing or hauling. The Timbrens are actually one of the most popular suspension enhancement systems on the market due to both cost and ease of installations. Furthermore, they will provide...
    view full answer...
  • Will SumoSprings Part # SSR-115-47-2 Work with B&W Gooseneck Hitch on a 2016 Ford F-250
    I do have a set of upgraded bump stops that will work with the B&W Turnoverball Underbed Gooseneck Trailer Hitch part # BWGNRK1111 on your 2016 Ford F-250 but the SumoSprings Rebel Custom Helper Springs part # SSR-115-47-2 will not. The mounting brackets on the B&W Gooseneck Hitch mounts in the same location (outside frame rail) as the SumoSprings therefore, will not work with one another. Instead, I recommend using either the SumoSprings Solo Custom Helper Springs part # SSR-127-54...
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  • Recommended Timbren Rear Suspension Enhancement for a 2017 Ford F-350
    For your 2017 Ford F-350, you have two options. You can go with either the Timbren Suspension Enhancement System part # TFR350SDJ or part # TFRTT350J. I recommend using the Timbren Suspension Enhancement System part # TFR350SDJ as these aeon springs are rated for a higher weight capacity and are made of a thicker rubber. The hollow rubber springs sit above the rear axle below the frame to help stabilize and provide up to 8,600 lbs of load support capacity. They are designed to provide...
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  • Availability of Spacers for Timbren Springs on Lifted 2019 Ford F-250
    The Timbren Suspension Enhancement System # TFRTT350J referenced in your question is confirmed to fit your 2019 Ford F-250 and will do a great job of adding support to the rear axle. If you have a true suspension lift on your F-250 where the axle was actually moved further from the frame then you will likely need to add a spacer. These are available in 1 inch # A25723-90AH00 and 1/2 inch # TA25722-90P00 sizes. You basically just need to use the amount of spacers that it takes so that...
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  • Best Timbren Suspension Enhancement System for a 2017 Ford F-250 with Truck Bed Camper
    I spoke to my contact at Timbren and they stated that the Timbren Suspension Enhancement System part # TFRTT350J is actually designed for service trucks or in your case trucks with a truck bed camper. Therefore, this will be the perfect kit for your 2017 Ford F-250. I also informed them that you currently have 8" of space between your frame and axle plate to which they stated that would give you a distance of 1-1/4" between the bottom of the spring and top of the contact point on your...
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  • How Tall are Timbren Springs that Fit 2020 Ford F-250
    There are two Timbren kits that fit your 2020 Ford F-250 we have the # TFR250SDJ which has an 8,600 pound capacity and fits 2- and 4-wheel drive models. And second we have # TFRTT350J which is rated for 8,000 pounds and also fits 2- and 4-wheel drive models. The springs in kit # TFR250SDJ are 4-1/2 inches tall and for kit # TFRTT350J they are 3-9/16 inches tall plus a spacer. So plus the mounting brackets that puts them at 6-7/8 inch and 7 inch.
    view full answer...
  • Suspension Enhancement Recommendation for 2019 Ford F-250 with Fifth Wheel Rail Kit
    For your 2019 Ford F-250 with a fifth wheel hitch rail kit installed in the bed of you'd need to go with a Timbren kit part # TFRTT350J for suspension enhancement. The air bag kit install brackets won't fit with the fifth wheel rail brackets as they occupy the same portion of the truck frame. The Timbrens are a great solution though as they give you the same support and don't require you to ever have to inflate any bags. They basically are there when you need then and when not needed you...
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  • Leveling 2019 Ford F-250 with Service Body
    The Timbren suspension enhancement # TFRTT350J is the easiest to install option to level your 2019 Ford F-250. This system is designed to be under a constant heavy load like what you have with your service body. The two springs work independently of each other so they're great at fixing the lean your truck is doing because of the off-center weight. To install the Timbrens you remove your current factory bump stops and put the Timbrens in their place. Once they're installed they're...
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  • Questions About Timbren Jounce-Style Springs for 2017 Ford F-250 Super Duty
    It is true that the 8,600 lbs capacity Timbren Jounce-Style Springs # TFR250SDJ measures 6-7/8" altogether while the 8,000 lbs capacity Timbren # TFRTT350J for heavy duty (Severe Service Vehicle) applications measure 7" altogether. I went out to the warehouse and double-checked these measurements just now. The 1" space for the # TFRTT350J kit is optional and does not have to be installed. I know it seems a little weird about the pricing, but it is important to remember that these...
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  • Which Torklift Stableloads Fit 2017 Ford F-250
    If you already have Timbrens # TFRTT350J installed on your truck and are needing additional suspension support you might be overworking your suspension. The install of the # TLA7200 is possible and you will have additional suspension support, but we can't promise that the ride quality unloaded will be smooth. With additional suspension bracing it might make the ride very stiff.
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  • Recommended Fifth Wheel Hitch With Adjustable Height Setting
    I will be happy to explain which fifth wheel will give you the height you need tow your fifth wheel trailer. Yes, your numbers and measurements appear to be very accurate, thank you for being so detailed. We do recommend at least 6 inches of clearance between the top of the truck bed rails and the bottom of your trailer. The amount of squat will vary but estimating 2" to 3" is a fair assumption. Ideally you would want to prevent as much squat as possible and to do this I recommend suspension...
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  • High Capacity Suspension Enhancement Recommendation for 2017 Ford F-350
    You'd want rear suspension enhancement that has a higher weight rating since you are going to be carrying so much weight. For that the Timbren rear suspension kit part # TFRTT350J would be your best option as it has a capacity of 8,000 lbs and is a confirmed fit for your 2017 Ford F-350.
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  • Timbren Jounce Spring Clearance to Axle in Ford F-250
    You have your Timbren jounce bumpers installed correctly in your F-250. The ideal spacing from the bottom of the spring to the top of the axle is right around that same half-inch that you have. In some applications the gap can be larger but 1/2-inch is within spec. This is enough of a gap that the springs will not engage when the truck is unloaded but close enough that the springs will engage the axle when there is a load, either cargo in the bed or trailer tongue weight.
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  • Is It Okay if Timbren Kit part # TFRTT350J Isn't Perfectly Centered over Axle
    You are totally fine. Thanks for sending in the picture of your Timbren kit part # TFRTT350J installed, and while it is not sitting perfectly square on the axle it is close enough to provide enough contact needed to work well. Due to how vehicles flex through the chassis, suspension, and frame bushings there might be a bit of variance in how the Timbren comes down and hits the axle every time.
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  • Suspension Enhancement Recommendation for 2017 Ford F-250 with Pull Rite Rail Kit 2766
    Firestone lists their Ride Rite Kit part # F2600 as a confirmed fit for your 2017 Ford F-250 with an in-bed hitch rail kit like the Pull-Rite setup you have. But looking up the install instructions for your Pullrite ISR 2766 they use a very large bracket that mounts to the outside of the frame where the Firestone kit would interfere with. Instead your best option would be the Timbren suspension kit part # TFRTT350J which installs in an area that would allow your Pullrite rails to fit.
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  • Recommended Timbren Suspension Kit for 2020 Ford F-350
    The best Timbren Suspension Enhancement System for your 2020 Ford F-350 is the Timbren # TFR350SDJ because they were designed with recreational towing in mind, as opposed to the kits which are meant to be used with more heavy-duty work trucks that have a constant load on them. The Timbren # TFR350SDJ that fit your 2020 F-350 are double-convoluted for more cushioning and support than the single-convoluted Timbrens like # TFRTT350J, which are also a fit on the 2020 Ford F-350. The Timbren...
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  • What Causes a Trailer to Bounce/Porpoise on Highway
    Porpoising (bouncing like you described) and sway are both commonly caused by the same thing when towing and that is not enough tongue weight for the trailer relative to the total amount of weight the trailer weighs. You need the tongue weight to be between 10 and 15 percent of the total trailer weight for the porpoising to stop. Suspension enhancement would actually cause the bounce to be more severe so I would not recommend going that route. I'd get the tongue weight checked and also...
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  • How Tall are The Timbren Kits that Fit 2020 Ford F-250
    We have two Timbren rear suspension kits that fit your 2020 Ford F-250 we have the standard duty # TFRTT350J which has a spring height of 3-9/16 inch and a bracket height of 2-3/8 inches. The severe duty # TFR250SDJ is 3-5/8 inches tall and has the same bracket height of 2-3/8 inches plus a 1 inch spacer. Timbren states that once a system is installed you will need 1/2 inch to 1-1/2 inches of space between the bottoms of the springs and the top of the axle. So that's why the higher...
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Info for this part was:

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