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  1. Vehicle Suspension
  2. Timbren
  3. Bump Stops
  4. Towing/Load Leveling
  5. Rear Axle Suspension Enhancement
  6. Extra Heavy Duty
THIS ITEM IS NOT A FIT FOR
2004 Freightliner Sprinter
Timbren

Timbren Suspension Enhancement System - Rear Axle

Part Number: TFRSDJ
In Stock
$496.65
Retail:$584.30
You Save: $87.65
Vehicle Suspension
Not Confirmed to Fit

2004 Freightliner Sprinter

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12,000-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. Great Prices for the best vehicle suspension from Timbren. Timbren Suspension Enhancement System - Rear Axle part number TFRSDJ can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TFRSDJ

  • Bump Stops
  • Towing/Load Leveling
  • Timbren
  • Rear Axle Suspension Enhancement
  • Extra Heavy Duty
  • Suspension Only

12,000-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 when towing or hauling gear
    • 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: 12,000 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 when loaded. 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 when loaded or towing because the rubber has more travel.



FRSDJ Timbren SES with Aeon Hollow Rubber Springs - Rear Axle - 12,000 lbs

Installation Details TFRSDJ Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

3522 reviews
5 Stars
(2800)
4 Stars
(460)
3 Stars
(114)
2 Stars
(67)
1 Star
(81)
12,000-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.

by:

Fast shipping



by:

Really not sure it's doing anything. No noticeable difference when towing my camper.



by:

These were delivered quickly and installed in minutes. I can't wait to give them a ride with my Airstream in tow.



by:

Easy installation and perfect fit!



by:

Customer service was great. Fast delivery. Very easy to install. 35 minutes it was done.



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Very easy installation!



by:

Easy install and work well on my 2500 S uburban



by:

Very easy to install. I got the product in two days. Love etrailer products. THANKS.



by:

Easy installation. 15 mins total time. Highly recommended if tow anything.



by:

nice ride with my 5th wheel



by:

Shipping was fast, product looks to be well made.



by:

Product does not help rear swag with fifth wheel camper but a half inch. On brand new truck as well. Not happy with product. Called to return them and want me to pay 27.00 shipping and stated in email that was sent to me I couldn’t return if installed. I’m not understanding this ? Do not buy ! I won’t be doing any more business with etrailer . Not helpful at all



by:

Just installed on 2008 Hyundai Entorouge seems to work well. Only problem was that I had buy new hardware because the supplied hardware was standard not metric.



by:

Works like expected. Keeps the truck looking level even under heavy loads.



by:

Excellent communication and insane fast shipping!



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Fast delivery and easy installation



by:

I received my order within days. It was exactly as I expected. The product works as advertised. I am a now a lifelong customer of etrailer.com.



by:

Excellent addition to my hd truck makes towing a lot easier



by:

Excellent customer service



by:

Yes about one year ago i installed this product with excellent results so far.



by:

Super fast to instal and make towing my 36ft camper a much smoother ride!



by:

Simple installation and the cost is gre at.



by:

Very efficient and great to work with. Will definitely use your company again. Thanks



by:

Installed in about 15 minutes,very easy.I pick up my new truck camper next week so I do not know how it works yet,but looks like it will work like its suppose too



by:

Product arrived on time and does exactly what it describes. Little stiffer ride without a load but with a load it made my truck handle so much better at low and high speed.


25
3522
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See what our Experts say about this Timbren Vehicle Suspension

  • Rear Suspension Enhancement Option For 2023 Ford F450 Super Duty Cab And Chassis
    Hello Dustin, thanks for reaching out. I am sorry to say the Air Lift # AL26RF will not fit the 2023 Ford F450 cab and chassis. Sadly, there is no air bag kit confirmed to fit the cab and chassis model. The only suspension enhancement option we have for the cab and chassis model is the Timbren # TFRSDJ. These are 12,000 lb rated rubber jounce springs. They will help to level and stabilize the rear of your truck so they will help with handling and reduce sway. Take a look at the install...
    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...
  • Is Timbren Suspension Enhancement for 2021 Ford F-450 Super Duty 4WD Compatible With 5th Wheel Hitch
    That's a good question, and I can confirm for you that the Timbrens which fit your 2021 Ford F-450 Super Duty 4WD, the Timbren Suspension Enhancement System # TFRSDJ are 100 percent compatible with a 5th wheel hitch. They install between the frame and your axle, so they will not interfere with 5th wheel (or gooseneck) brackets. The Timbrens are a really good choice for your F-450 because when you have additional weight at the rear of your truck - like when you are towing - the added weight...
    view full answer...
  • Will Timbren Suspension Enhancement System TFRSDJ Fit 2022 Ford F-450?
    The Timbren Suspension Enhancement System # TFRSDJ you were looking at is a confirmed fit for your 2022 Ford F-450 so it will fit perfectly. This fits both the 2WD and 4WD models. I included a video review of the TFRSDJ for you to take a look at.
    view full answer...
  • Will Standard Timbren SES With Higher Capacity Offer More Support Than Severe Service On 2021 F-450
    Hey Dustin, welcome back! The Timbren SES # TFRSDJ will offer you more support over the severe service kit # TFRTT350J. Are you experiencing squat with your current Timbrens? If you are then it would be worth upgrading. If you really aren't, then it isn't worth the money. The severe service kit has a different design and engages sooner to help with constant, top-heavy loads like a slide-in camper. With that heavy car hauler you will gain more from the higher capacity of the standard Timbren...
    view full answer...
  • Non-Airbag Suspension Upgrade Option for a 2019 Ford F-450
    If you are asking for a suspension upgrade kit that has adjustable bags that do not use air, I am not aware of any that exist. If you are just asking for a suspension upgrade kit that does not use air, then we have the Timbren Suspension Enhancement System # TFRSDJ. This system installs directly onto the frame of your F-450 and works independently for side-to-side load leveling. It becomes more rigid as more weight is added and acts as a shock absorber.
    view full answer...
  • Suspension Enhancement That Fits 2023 Ford F-450 2WD
    At this time we don't have any air bag suspension enhancement kits that fit your 2023 Ford F-450 2WD. Only solution would be a Timbren like the part # TFRSDJ.
    view full answer...
  • Do the Air Lift LoadLifter 7500XL Air Springs # AL57596 Fit a 2015 Ford F-450?
    There are a lot of great options for air springs for your 2015 For F-450, but the Air Lift LoadLifter 7500 XL # AL57596 you were looking at will not fit your vehicle. If you are looking for a Air Lift brand kit, you can use the Air Lift LoadLifter 5000 Ultimate Air Helper Springs # AL88349, but these have a weight capacity of only 5,000 lbs. If you need the extra weight capacity, you can use the Timbren Suspension Enhancement System # TFRSDJ, which have a 12,000 lb weight capacity. Check...
    view full answer...

Do you have a question about this Vehicle Suspension?


Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Cole B
Installed by:
Cole B
Employee Robert C
Installed by:
Robert C
Employee Mary K
Updated by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Michael B
Updated by:
Michael B
Employee Noah M
Updated by:
Noah M
Employee Carrie F
Updated by:
Carrie F
Employee Lincoln B
Updated by:
Lincoln B
Employee Jonathan Y
Video by:
Jonathan Y
Employee Anna W
Written by:
Anna W
Employee Adam E
Test Fit:
Adam E

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