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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
2009 Ford Ranger
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Timbren

Timbren Suspension Enhancement System - Rear Axle

Part Number: T55AV
In Stock
$269.36
Retail:$316.90
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Vehicle Suspension
Not Confirmed to Fit

2009 Ford Ranger

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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Upgrade your vehicle's suspension with hollow rubber springs that absorb shock, minimize sag, and boost stability. Whether hauling gear or towing a trailer, enjoy better handling and a smoother ride with zero maintenance. Great Prices for the best vehicle suspension from Timbren. Timbren Suspension Enhancement System - Rear Axle part number T55AV can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - T55AV

Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachment points
  • 11,000-lb Load Support: Levels your truck and cuts rear sag for safer, steadier towing.
  • Smoother, More Stable Ride: Hollow rubber springs absorb bumps and reduce road shock.
  • Better Steering and Braking: Keeps your truck level so handling stays consistent under load.
  • More Control When Towing: Minimizes sway and bounce so trailers track straight and stable.
  • Zero Maintenance Required: No air lines or compressors—just install once and haul confidently.

Features to know about

Stay Level and Confident Under Heavy Loads: 11,000-lb Rear Suspension Support

When you hitch up a fully loaded trailer or pack the bed full of gear, these hollow rubber springs step in with 11,000-lb load-leveling capacity. They keep your ride height even and your steering and braking steady so your truck feels balanced and controlled. No more rear-end squat or sag throwing off your handling when towing or hauling serious weight.

Truck bed loaded with heavy cargo showing rear sag before Timbren suspension installation

Keep Control on Rough Roads: Shock-Absorbing Rubber Springs

Bumpy highways and uneven terrain can make a heavy rig bounce and jolt. These rubber springs absorb road shock and cushion the impact, helping smooth out the ride for both your truck and trailer. The result is less wear on your suspension components and a more comfortable drive when the pavement gets rough.

Truck driving on rough road showing how Timbren suspension absorbs bumps and reduces shock impact

Drive Steady Through Turns and Crosswinds: Independent Spring Action

Sharp turns, off-center loads, or gusty crosswinds can make a loaded vehicle lean or sway. Each spring works independently to counter body roll, keeping both sides planted for better stability. That extra control gives you confidence whether you’re cornering on mountain roads or swerving to avoid an obstacle.

Timbren suspension system preventing truck body roll, sway, and squat during turns or uneven loads

Truck towing a trailer showing sway control improvement with Timbren suspension system installed

Skip the Maintenance Hassle: Simple, One-Time Installation

Unlike airbag setups that need compressors, hoses, or pressure checks, these springs are maintenance-free. Just install them once and they automatically engage when needed to handle heavy loads. You get consistent suspension support every time you tow or haul—no tools or adjustments required.

Specs

Weight and Capacity

  • Load-leveling capacity: 11,000 lbs

Diagram comparing truck stance with Timbren suspension loaded versus unloaded to show reduced sag

Warranty

  • Warranty: Lifetime warranty Satisfaction guarantee

Note

Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.

MBRSP25C4 Timbren SES with Aeon Hollow Rubber Springs - Rear Axle

Installation Details T55AV Installation instructions

This Product Fits The Following Vehicles




Video of Timbren Suspension Enhancement System - Rear Axle
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Timbren Vehicle Suspension - Rear Towing/Load Leveling - T55AV

Hello everybody, this is Jeff at etrailer. Today we're gonna take a look at the Timbren Rear Suspension Enhancement System. Now this kit here is a custom fit part. It is designed to fit the 2019 to 2021 Freightliner Sprinter 2500 four-wheel drive vehicles. Also fits the 2019 and newer Mercedes-Benz Sprinter 2500 four-wheel drive vehicles. Now on a custom fit part like this one, I do like to recommend for you go to our website, use the fit guy, put in your year and model vehicle and it'll sure this will work for your application.

Now this kit here is gonna improve suspension and handling and safety of your vehicle. It does include everything laid out here on the table. It includes these two Aeon Hollow Rubber Springs, the two mounting brackets, four vehicle specific mounting brackets, the four spacers with the hardware for a nice simple installation. Now when you do install this, you will remove or replace the axle bump stops that are on the frame and there's no drilling required for this and there's no maintenance required, 'cause unlike airbags, there's no compressors or pressure adjustments, you just install and forget. This will provide additional support as needed, as you always have a nice, smooth, comfortable ride.

It'll allow the leaf spring ample movement while cushioning light loads, and it does not affect the empty ride of the vehicle and then becomes more rigid as more weight is added. It increases stability, provides great performance while hauling heavy loads, and it'll even reduce vehicle sag. These do work independently, side to side, help compensate for off center loads, reduces body roll when you're swerving and turning corners. These do also act as shock absorbers. Taking the brunt of bumps and rough roads, helps extend the life of your vehicle's suspension.

Now the capacity on this kit is 11,000 pounds. One note I wanna mention is Timbren springs will not increase your vehicle's weight carrying capacity, so you do wanna make sure not to exceed the manufacturer's recommended weight limit. These are designed to work with the suspension system that is in good working order. Now if you do have any other additional questions regarding this part or any other item we carry, please feel free to reach out to us so we can get all the questions answered for you. But that is gonna do it for a look at this Timbren Rear Suspension Enhancement System.

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Customer Satisfaction Score:

Ratings & Reviews

4.7

7279 reviews
5 Stars
(5861)
4 Stars
(880)
3 Stars
(207)
2 Stars
(134)
1 Star
(197)
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Upgrade your vehicle's suspension with hollow rubber springs that absorb shock, minimize sag, and boost stability. Whether hauling gear or towing a trailer, enjoy better handling and a smoother ride with zero maintenance.

by:

Added these to my F250 Super Duty. I carry a golf cart on a Diamond back bed cover. Can be a little top heavy. Perfect addition to my suspension- greatly reduced the sway.



by:

Easy to install using basic hand tools, and stopped the "sag" when I hook up my Casita travel trailer



by:

Great product. The ride and body roll at the rear axle are notceably improved (1989 Ford E350 Class C RV , 27 ft). I give it 4 stars because the installation was slightly complicated due to the rear brake lines needing to be slightly bent to provide clearance for the U bolts supplied in the kit. Great product and wish it came in a 5000 lb version.



by:

I've had these on our tow rig for a year now and I added buy them again today if I needed them.these have worked much better than airbags for our coil spring rear suspension to handle the tongue weight of our trailer. The SUV sits level when the trailer is on and it handles bumps and sway better than the airbags did providing much more comfort to us in the vehicle. Unloaded, we don't really notice they are there, unless, we have all the kids and some friends loaded up and you will fell them work when going over bumps.i do all my maintenance on the vehicle's and inspect these regularly and I cant see any wear so far even though we've gone on 6 trips with our trailer with about 5000 miles doing so.
I cant say these are the best for every truck or SUV, but for ours it is the best and I definitely would recommend to others.



by:

2,000 miles in on a trip from the east coast to the Canadian Rockies these work great while loaded and towing. Close to zero bounce while towing, I love them. Unloaded, however, the ride in my 2026 Tundra has gone south. There is a noticeable, abrupt stop of the units hitting the axle when going over any kind of bump. When I get home and back to regular driving, I may just take them off, its that bad.



by:

Well they are exactly what I thought it would be. Hard for me to say it's what I needed yet.
I installed them on a homemade trailer from a salvaged 2001 base model tacoma. Once I get finished building it out and have some weight in it I'll have a better idea. But from what I've seen so far on a couple test drives they should come into effect when needed.
For reference I building an Tacoma based trailer with an ARE Contractor topper with a Naturnest roof top tent on the very top. So to counter and sway these should be very helpful. At least I hope so. I'm not an engineer but I did stay at an Holliday Inn once.



by:

The Timbren SES is a simple solution for rear squat when towing. When hitched to my 30' Airstream Globetrotter (8800 GVWR) with a tongue weight around 1200 lbs, my Silverado 2500HD had a bit more squat than is ideal. I shopped airbags but didn't want to spend ~$2K for the set up and didn't want the hassle of installation and forever chasing air leaks. The Timbren SES literally installs on the Silverado in about 15 minutes. So simple. No bags, no compressor, no wiring, no air lines, no leaks. And WAY less expensive to boot. Just returned form a 600+ mile trip and it towed flawlessly.



by:

A very simple and straightforward installation once you get the oem bumper stops off (had a shop do that)
Timbren worked with me as I had a non OEM frame height (vehicle was lower than stock) to recommend the proper kit. Highly recommend contacting timbren if you are unsure of the proper kit to use. Ride is more stable. It does feel stiffer and less bouncy but am looking forward to seeing how it performs with my truck camper. Truck is a 1998 dodge ram 2500. Brake line over left side of axle needed to be secured to prevent damage.



by:

The Timbren overload spring/bumper was east to install and did what it was supposed to do when I hitched up a camp trailer. These did not negatively affect the ride by any means and I don't have to worry about the troubles with air bags.



by:

Stiffens and corrects kneel in rear end of 2023 Chevy Silverado 1500. You will notice a stiffening of the rear end suspension while unloaded, but it’s a fair trade off to prevent sagging and porpoising while towing. I found it easier to pull the rear wheels and work from the side than underneath the vehicle while installing.



by:

The timbres bump stop is exactly the right height to meet the axel when the trailer is connected with all its weight onto the hitch. I have an Andersen weight distribution hitch and it levels out perfectly. The day picture is with the coach (Winn 2100bh) with factory equipment. The night picture is after the timbres are in place. Looks good.



by:

It has been almost a year since I installed Timbren Suspension Enhancement Systems (DVF350 and DVR350R) on the front and rear of my 2003 Dodge RAM Van 3500. These bumpers replaced the OEM bump stops that were on my van. I like the Timbren bumpers much better than the OEM bump stops because they provide a progressively cushioned response for suspension compression when traveling over significant humps like speed bumps in a parking lot, or curb ramps into driveways. I did not like the abrupt stop the OEM bump stops provided when traveling over the same objects. I installed the Timbren rear bumpers first, and after a few months of use, I decided to add them to the front. In both cases, the front and rear Timbren bumpers were easy to install once the OEM bump stops were removed. Installation required reuse of the factory hardware. On my van, the Timbren bumpers are not always engaged. Under normal load and travel conditions the bumpers are relaxed and about 1/2” away from the suspension landing points. However, their presence is much appreciated and very noticeable when the van is carrying heavy loads or handling significant humps.



by:

Absolutely Pleased with the TIMBRENS. They were easy to install, and took less than an hour to install both. I noticed a slight stiffness in the ride as the rear bounced over a bad roadway. Towing is great, with a nice level and smooth ride. I am glad that I did not order the heavier duty Timbrens, than what was recomended for my truck. I believe the ride would have been too stiff. If you look at the photos showing the timbrens, the truck is still lifted in the rear, so what you see is a big gap between the rubber, and the steal plate. When the truck is lowered, there's 1" of space as it should be. BTW, I have been purchasing from etrailer for years now, and I have to say that I have never had any issues with any orders. They are my go to folks for all of my vehicle suppension stuff and trailer stuff. You can't go wrong with buying from them.



by:

Just got these on and haven’t been able to do a lot of testing yet, but it looks like they command their price. Huge difference in sag in the rear end of our Honda Pilot. As others have appeared to do in this review section before me, I started using a WDH with these and that looks to really be the winning combination with the Timbren SES. Our travel trailer is 3,500 lbs and it was squatting the pilot pretty well before. This timbren SES is a great addition. Can’t go wrong.



by:

My F53 was like driving a waterbed down the road. With the Timbrens, it’s a different vehicle. Should have installed them years ago. Etrailer is my go to for anything trailer. FAST shipping and prompt responses to questions or concerns.



by:

2022 F250 Super Duty. Super easy to install. I have about 3/4" gap between the spring and the plate. Time will tell how they impact the ride quality and how much sag they mitigate with my 5th wheel hooked up.



by:

Timbren Spring Helpers were exactly what I needed on my Tundra plus a spacer kit since I have a 3” TRD lift. They were packaged neatly, with proper hardware, and excellent instructions! They absolutely do exactly what they are supposed to do! Truck rides much better and helps level out the load!



by:

I'm suitably impressed with the difference i feel.
I have about 250 lbs. of static load with my topper and Decked cargo system. This put my install gap with no spacers just under the reccomended 1 inch minimum.Then add a couple hundred more pounds hauling music gear 100 shows a year, and the stop is resting on the axle.
I feel the absorption of the Timbren material is better than the flimsy stock bump stops. More cushion.
Where i really feel the difference is in the stabilty of excessive side sway when turning while loaded.
I have a gig coming up that will involve some unpaved mountain roads to get there so I think i will have a real goid idea of how these Timbren's will perform.
Instalation took me about an hour at 11 p.m.
The product it of the highest quality in design and build.
And Etrailer is a company that I would not hesitate to buy from in the future.
Thanks Dee Dee.
You rawk!!



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Easy to install. Made ride great



by:

The bump stops work as well as air bags but less maintenance, longer warranty, and and very easy to install



by:

Extremely difficult to line the bolts up with the inserts in the rubber block. The inserts keep falling out.
Tolerances for the hole centers on the metal spacer to tight, making the holes slightly oversized would help with this issue. As a result of this problem it took 1-1/2 hours each side trying to get the metal inserts to stay in place



by:

Very solid build and well thought out bump stop for my Mercedes sprinter 2500 four-wheel-drive
I use the longer bolts included in the kit.


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Condition: Installed

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Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Leah S
Edited by:
Leah S
Employee Wilson B
Updated by:
Wilson B
Employee Katherine B
Updated by:
Katherine B
Employee Dawn Z
Written by:
Dawn Z

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