bing tracking image
  1. Vehicle Suspension
  2. Timbren
  3. Jounce-Style Springs
  4. Rear Axle Suspension Enhancement
  5. Extra Heavy Duty
Timbren Suspension Enhancement System - Severe Service - Rear Axle
Timbren

Timbren Suspension Enhancement System - Severe Service - Rear Axle

Part Number: TFRTT350J
In Stock
$398.07
Retail:$468.32
You Save: $70.25
Vehicle Suspension

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Add to cart
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

8,000-lb Capacity hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. Provides a comfortable ride by absorbing road shock and improving stability. Ideal for trucks with slide-in campers or an in-bed salt spreader. Great Prices for the best vehicle suspension from Timbren. Timbren Suspension Enhancement System - Severe Service - Rear Axle part number TFRTT350J can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (6509)
  • Q & A (0)
  • Photos
  • Used (1)

Timbren Vehicle Suspension - TFRTT350J

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

8,000-lb Capacity hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. Provides a comfortable ride by absorbing road shock and improving stability. Ideal for trucks with slide-in campers or an in-bed salt spreader.


Features:

  • Improves suspension, handling, and safety
    • Ideal for trucks with slide-in campers or an in-bed salt spreader
  • Provides additional support as needed so you always have a smooth, comfortable ride
    • Allows the leaf spring ample movement while cushioning light loads
    • 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 - Severe Service

Installation Details TFRTT350J Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Timbren Suspension Enhancement System - Severe Service - Rear Axle - TFRTT350J

Average Customer Rating:  4.7 out of 5 stars   (6507 Customer Reviews)

8,000-lb Capacity hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. Provides a comfortable ride by absorbing road shock and improving stability. Ideal for trucks with slide-in campers or an in-bed salt spreader.

by:

Great product. Super easy install. I installed this and the sway bars the same day they arrived. I am very pleased with the results.



by:

Easy to install, and do a great job. 2016 Dodge 1500 hauling Lance 650, total weight of camper fully loaded, around one ton ...

w.



by:

This product is easy to install, and does exactly what it is intended to do. My husband pulls a 18 ft trailer loaded with plumbing equipment everyday. The sag is gone, the drive is a lot smoother than before. He is loving the way his van is now handling.



by:

Etrailer answers my questions and has always steered me in the right direction with excellent products.



by:

Received a day ahead of schedule, packaging was in tach , installation was quick and simple . Have them installed but yet to load the pick up to see how they work or I would have given five stars



by:

Excellent product. Just what I needed. Etrailer great company to deal with very informative. Thank you.



by:

Quick and easy install, haven’t hauled anything yet or towed my trailer but excited so put these to use!



by:

Shipping was so efficient arrived days before estimated. Order was placed and within an hour was shipped!!!



by:

Fast delivery about 3 days easy to install and seems to work fine. Ride is a little stiffer with loaded trailer but not bad.



by:

Easy install and noticable change in suspension performance. Makes a great addition if you are pulling a trailer or hauling loads.



by:

Everything arrived as promised been towing with the product a week or so really helps with truck Sway and bounce



by:

The service and delivery of these suspension assist was an example of professionalism. I am grateful.



by:

So easy to install. Just use supplied bolts to assemble the spring to the plate. Then use bolts from your bump stop to attach to the frame. Check your clearances and your done!



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.



by:

These work great, highly recommend.



by:

They look as shown on the home page
Fast service



by:

Easy installation and excellent shipping speed! Thanks ETrailer!



by:

Your company ships right away and very helpful web site easy to use have not installed yet but will let you know asap thanks for your help



by:

This product was delivered quickly and efficiently. The quality of the product is excellent and look forward to seeing how they work when we are towing our trailer.



by:

Great product. I haven't installed this set on my new truck yet, but I had them on my older truck and they did the job they were intended to do. Only problem was when the package arrived, the box was split open to the point of everything falling out. But no parts were lost, this time.



by:

Definitely worked as advertised, very easy to install.



by:

This is a excellent product. I had them in my F-250 and when I bought my new RAM it was the first accessory I added. Best bang for the buck suspension product on the market today!



by:

Canot believes that it came from so far and did not even take 2 full days to cross the border all the way to a small town in the province of Quebec Canada 2 tums up for deleverer for the timbren product took 30 minutes to complete the job very easy took the pick up for a ride this morning did not see any difference in handling the truck was empty can't wait to see how good of a job they will do when pulling the fifth wheel next week thanks again



by:

Very easy to install 30 min. tops. Have not tried them with the trailer yet but I'm sure they will do the trick. Very pleased!



by:

They did not fit right on my 2021 power wagon, I had to modify to make them line up with my differential and had to buy shorter mounting bolts for the bracket plus they where already used


25
3593
Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Suspension Enhancement for 2017 Ford F-450 Tow Truck
    Hi Josh; since your 2017 Ford F-450 is a tow truck I recommend getting the Timbren SES over SumoSprings. These provide a higher level of support which will be ideal for your line of work. The # TFRTT350J you were looking at is designed for a constant load in the bed of the truck, like a salt spreader or slide-in camper. I would say your towing equipment also qualifies since it is always sitting on the back of the truck, making this system ideal for your setup so it is what I recommend.
    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...
  • Best Timbren Suspension Enhancement For 2023 Ford F-350 Super Duty
    There are two Timbren systems for your 2023 Ford F-350, like you said, with the best definitely being the following part number: - Timbren Suspension Enhancement System # TFR350SDJ The reason for that is the # TFR350SDJ is designed for standard pickups while the other kit, part # TFRTT350J, is designed for service vehicles like a salt spreader, for example. The differences is that the # TFR350SDJ is double convoluted, which just means its shape is designed to compress more, giving you...
    view full answer...
    Image 1 for
  • Can I Use the Timbren Spacer Kit w/ a Severe Service Timbren System on a 2023 Ford F-250?
    Yes, it does. The Spacer Kit for Timbren Suspension item # T68MR will work with the Severe Service Timbren Suspension Enhancement System item # TFRTT350J. This system is confirmed to fit the 2023 Ford F-250. It already includes a pair of 1" spacers. When installed these spacers make the item # TFRTT350J system 7" tall. I have attached a diagram below. If you don't want need to buy the full kit, you can buy the 1/2" spacer item # TA25722-90P00 or the 1" spacer item # A25723-90AH00 separately....
    view full answer...
    Image 1 for
  • What Replacement Bump Stops Are Confirmed to Fit a 2024 Ford F-350 Super Duty?
    Here is a list of the bump stop replacements we have which fit your 2024 Ford F-350. If you can tell me how you plan to use your F-350 I can give you my personal recommendation for the option which works best for you. Timbren Front 2WD # TFF350SD2 4WD # TFF350SDC Timbren Rear 2WD/4WD # TFRTT350J SumoSprings Front 2WD/4WD 1,000LB # SSF-111-40 2WD/4WD 1,500LB # SSF-111-47 SumoSprings Rear 2WD/4WD 3,000LB # SSR-128-40-2 2WD/4WD 1,500LB # SSR-127-47 2WD/4WD 2,800LB # SSR-127-54 2WD/4WD...
    view full answer...
  • Suspension Enhancement Recommendation for 2023 Ford F-350 Towing Fifth Wheel
    When people are looking for suspension enhancement for their trucks like your 2023 Ford F-350 I generally don't like to recommend Timbrens unless the vehicle is going to be basically towing heavy all of the time as they are known to make the ride quality pretty harsh. Instead I would recommend actually the Supersprings kit part # SSA46 which will give you the support you are wanting without making the ride quality rough and actually improves handling and sway. The Torklifts aren't a bad...
    view full answer...
  • 2024 Ford F-450 Super Duty Timbren Suspension Enhancement Kit Recommendation
    I recommend going with the Timbren Suspension Enhancement System # TFRSDJ for your 2024 Ford F-450 Super Duty because it's designed better for pickup truck-type applications. The other Timbren kit # TFRTT350J is designed more for Severe Service vehicles like that will have more constant heavy loads in them (like a slide-in camper, salt spreader, or crane) so if your F-450 is only going to be used like a pickup then the first kit is what you want to use. We've actually had the opportunity...
    view full answer...
  • Recommended Rear Suspension Enhancement For 2021 Ford F-350 4WD Towing 35' Gooseneck Horse Trailer
    The Timbren Suspension Enhancement System - Rear Axle # TFRTT350J you were looking at will fit your 2021 Ford F-350 4WD but are very stiff and will lead to a very harsh unloaded ride. Instead I recommend the SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle # SSR-128-47-2 which offers 4600lbs of load leveling support which will be perfect for providing support to the rear suspension of your F-350 when towing your 35' LQ Gooseneck Horse Trailer. These springs are progressive...
    view full answer...
  • Spacer Kit for Timbren Kit that Fits 2021 Ford F-350
    To get the gap close enough between the axle and the Timbren kit you installed you would want to install the spacers like you mentioned. For that we have the 1 inch spacer part # A25723-90AH00 and the 1/2 inch spacer # TA25723-90AD00. To pick out the correct bolt length you'd want to take the bolt you have now with you to a hardware store and buy one that is 1-1/2 inches longer than what you have now that is Grade 8. If for some reason you feel the ride quality is too harsh you could remove...
    view full answer...
  • 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 capacity...
    view full answer...
    Image 1 for
  • Spacers for Timbren Suspension Enhancement System on 2022 Ford F-350
    Yes, you can stack the 1 inch spacer, # A25723-90AH00 and the 1/2 inch spacer, # TA25723-90AD00 but you will most likely need to replace the hardware too. I suggest you source this locally, purchase Grade 8 hardware, and simply buy one 1-1/2" longer than current bolt.
    view full answer...
  • How To Reduce Squatting With 2024 Ford F350?
    For your 2024 F350 with weight in the back, I would install the Timbren # TFRTT350J which are made for severe duty trucks. This will stop the back from squatting and also save your suspension from wearing quickly.
    view full answer...
  • 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...
    Image 1 for Image 2 for
  • How Much Space Is Needed To Install The Timbren TFRTT350J On A 2022 Ford F-250 With An In-Bed Camper
    The Timbren TFRTT350J will measure 7" from the top of the bracket to the bottom of the rubber spring/jounce. With you having 8-1/2" of space on your 2022 Ford F-250 Super Duty, you will have a 1-1/2" gap between the bottom of the spring/jounce. It is recommended to have anywhere from 1/2" at the minimum up to 1-1/2" at the maximum for this spacing, so it will definitely work for you. Especially once the camper is installed in the bed. With this also having an 8,000 pound load leveling capacity,...
    view full answer...
    Image 1 for
  • 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...
    view full answer...
  • Recommended Replacement Bump Stops for Slide in Truck Camper on 2022 Ford F-350
    The Timbren # TFRTT350J is a fit for your 2022 Ford F350 4x4, but its 8600 lb capacity would be overkill for your application, in my opinion. You'd have a pretty rough ride with the suspension under load. I believe you'd be happier with the SumoSprings # SSR-128-47-2 with its 5000 lb capacity. The SumoSprings are made of a more pliable material which would provide a better loaded (and unloaded) ride quality, The # SSR-128-47-2 is for vehicles with a bump stop perch over the axle, If you...
    view full answer...
  • Will Spacers Be Needed To Install Timbren Suspension Enhancement On A Lifted 2021 Toyota 4Runner?
    As your 2021 Toyota 4Runner is lifted, you will indeed need to use spacers when installing a Timbren suspension enhancement system. The correct spacers will depend on if you will be using both rear and front jounces, and I have all options for your 4Runner listed below. Rear Set Up: 1/2" Bolt Timbren Rear Suspension Enhancement System 6,000 lbs # TTORSEQ Timbren Active Off-Road Bumpstops - Rear Suspension - 6,000 lbs # TABSTORSEQ Front Set Up: 3/8" Bolt Timbren Front Suspension Enhancement...
    view full answer...
  • 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...
  • 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...
    view full answer...
  • Timbren Rear Suspension System Comparison for Kit # TFR250SDJ and # TFRTT350J
    The Timbren Suspension Enhancement System # TFRTT350J is designed for use with Severe Service Vehicle's. This is the one that is recommended for tow trucks, ambulances, trucks with in bed tool boxes. I only recommend that this kit be used on vehicles that will always have weight in the bed. These have a 8,000lb capacity. If you use your vehicle for occasional towing and weight in the bed the Timbren Suspension Enhancement System # TFR250SDJ is the better system to use. These springs have...
    view full answer...
  • 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...
    view full answer...
    Image 1 for
  • 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...
    view full answer...
  • What Timbren Suspension Enhancements Fit A 2022 Ford F-350 FX4
    The Timbren Suspension Enhancement System # TFRTT350J are the correct rear suspension enhancements for your 2022 Ford F-350 4x4. These suspension enhancements will help improve safety and handling as well as, and reduce body roll when swerving and turning corners.
    view full answer...
  • 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 you...
    view full answer...


< Previous
123. . .4



Do you have a question about this Vehicle Suspension?


Used Items Available
Used Picture for Timbren Suspension Enhancement System - Severe Service - Rear Axle

Condition: Like New

Notes: May have damaged packaging or minor cosmetic blemishes.

$328.95
Add to Cart
Secure Checkout

Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Andrew K
Video by:
Andrew K
Employee Jonathan Y
Video by:
Jonathan Y
Employee Daniel D
Video by:
Daniel D
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Cole B
Installed by:
Cole B
Employee Robert C
Installed by:
Robert C
Employee Bradley B
Installed by:
Bradley B
Employee Mary K
Updated by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Michael B
Updated by:
Michael B
Employee Carrie F
Updated by:
Carrie F
Employee Bethann B
Updated by:
Bethann B
Employee Anna W
Written by:
Anna W
Employee Ryan G
Test Fit:
Ryan G
Employee Bruce K
Test Fit:
Bruce K

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.