Timbren Suspension Enhancement System - Severe Service - Rear Axle
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2022 Ram ProMaster 2500
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2022 Ram ProMaster 2500
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When you load up the bed or hitch a heavy trailer, this system keeps your ride level and steady. The Timbren Suspension Enhancement System uses 7,000-lb capacity hollow rubber springs above the rear axle to handle the extra weight. It works with your factory suspension to reduce sag so your steering, braking, and traction stay consistent when hauling gear or towing.
These hollow rubber springs compress progressively—soft at first for lighter loads and more rigid as weight increases. That design smooths out bumps and rough pavement while protecting your suspension from bottoming out. The rubber also soaks up road shock so the ride feels more comfortable and controlled when loaded down.
Each spring reacts only when that side of the vehicle needs support. That independent action keeps body roll in check through corners and helps control sway from passing trucks or gusty conditions. Even with an off-center load, the system balances things out so your truck feels planted and stable.
You don’t need compressors or hoses to get heavy-duty support. This setup replaces your existing bump stops using custom brackets that bolt to the frame—no drilling required. Installation takes around an hour depending on skill level, making it a straightforward upgrade for anyone comfortable with hand tools.
The Aeon hollow rubber springs are built to last while protecting your factory suspension from wear. By cushioning impacts and preventing bottoming out, they extend suspension life and keep performance consistent season after season.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello, everybody. This is Jeff at etrailer.com. Today, we're going to take a look at this Timbren rear suspension enhancement system. Now, this is a custom fit part. It is designed to fit the 2000, the 2002 Dodge Ram 2500 trucks, the 1994 to 2002 Dodge Ram 3500 trucks, and the 1994 to 1999, Dodge Ram 3500 cabin chassis models. And on a custom fit part like this, always like to recommend for you to go to our website, use the fit guide, put in your year and model vehicle, and it'll show if this'll work tree application.Now this will improve your suspension, your handling and the safety.
It provides additional support as needed. So you always have a nice, smooth, comfortable ride. It will allow the leaf spring ample movement while cushioning light loads, and it does not affect the empty ride of the vehicle. It will become more rigid as more weight is added. This will increase stability, provides great performance while hauling heavy loads, and helps reduce vehicle sag.These do work independently side to side, help compensate for any off-center loads.
They do reduce body roll when swerving and turning corners, and they will act as shock absorbers taking the brunt of any bumps and rough roads. Helps extend the life of your vehicle suspension. Does include everything laid out here on the table. It includes the two A-eon hollow rubber Springs right here. All the vehicle specific bracket you need to install it, all the hardware you need...
Nice set of detailed instructions that'll describe how to install it. Now it does install directly onto the frame. There's no drilling required. Few specs on this, the capacity is 7,000 pounds. Now the Timbren springs will not increase your vehicle's weight carrying capacity, so you do want to make sure not to exceed the manufacturer's recommended weight limit.
And these are designed to work with a suspension system that is in good working order. But that should do it for the review on the Timbren rear suspension enhancement system..
Ratings & Reviews
Package arrived and pretty beat up from shipping, everything was there except the hardware. I sent etrailer an email and Joy T. replied back quickly, got hardware in the mail and I installed today. Great service and quick response!
Works very well on my Ram 3500 long box 4x4. Really helped with stability pulling a 2600# tongue weight, 16K Gvw 5th wheel. Super easy install!
Awesome. They work great. I’m glad I chose this path versus airbags.
The reality of how long it took to install was misrepresented. I am 74 years old and my wife and I installed these bump stops in about a 2 hour span including rest time. We actually expected that. The results were as promised and I truly appreciate that.
Quality product, I have owned Timbrens before. They work good. Installation is fairly easy depending on your skill level. Etrailer as always - great!
My truck has an added utility body in the bed at all times. Before addinng the Enhancement System I did not feel that I had control of the truck. After adding the system the truck drives much easier and has a "safter" fee.
Do not keep vehicle level. 800 Lb. tongue weight trail still lowers rear of truck approximately 4 inches. 3500 GMC Dually 4x4
My advice is don't be lazy just go with air bags.
They say satisfaction guaranteed defiantly not satisfied and will be less than happy if they charge me a restocking fee on a bad product. I should have known better.
It would be helpful if the kit contained all the hardware to attach it to the truck. I purchased this to replace a Loadlifter 5000 that was installed 9 years ago. I don’t have the OEM clip and nuts that goes into the frame. It took hours of searching before I finally figured out I could find it on the Ford suspension schematics.
Love my Timbrens. Had airbags and was tired of leaks and the need to adjust air pressure. Easy to install!
They are difficult to seat. Soapy water does nothing to help. I had to spray with silicon,jack up the back of the truck and place 2x4's between the bump stop and the axle,NUMEROUS TIMES.
Once I towed my 5th wheel I noticed the difference. When unloaded, the ride is normal.
The Timbrens arrived and install was a breeze. Look to be of very good quality. I went with the severe duty because my truck is always loaded up with camping supplies, electric bikes tools…. The topper on back along with the slide tray are added weight. I pull a 7k travel Trailer with 650-700 pounds on hitch. The Timbrens are barely touching the axel without the trailer. I really enjoy dealing with etrailer. They answer all your questions and always put the customer first. It’s kind of like your project is their project.
The installation was pretty simple and I’m sure they will work out fine, but I won’t know for sure until the next time I have to take my tractor on the trailer or load up my ATV.
I ran air bags on my previous trucks when pulling my 5th wheel and trailers, but these worked just as well without the expense. I run them on a F350. Great product!!!
It was tough to remove the stock bump stops on a 06 f350 the new timbrens were straight forward easy to install. They are quite expensive for what they are! I won’t be putting the slide in camper back on until spring so I really won’t know how they will perform but I hope they work as advertised.
Really won't know until I put my truck camper on the vehicle. Product looks and feels quality, we'll see about performance. Installation instructions could be a bit more detailed.
Time will tell! Fast and easy install on my 2012 custom flatbed tundra. Hoping this will help when I overload my truck. I have about 900 lbs of extra weight on my truck at all times + Old man Emu heavy duty leaf springs.
I have Timbrens on an F350. We have a heavy truck camper that we use multiple times a year. I've had both these and airbags on multiple rigs over the years and the Timbrens are superior by far especially because they don't leak at the connections, valves or bags or work loose. They also help with the sway.
There is no pump or electrical involved. Airbags have just too many parts and potential points of failure guaranteed to happen away from home on a muddy road. Once Timbres are installed you're done. In this case the less expensive and simpler solution is the better one!
Works well on my F250 6.75 bed with a 1700lb dry Capri Retreat camper. Solved 4" squat without airbags. Eliminated sway in high winds.
Great product!
Quick service, with everything as advertised !
They put my truck right back where it was from the factory
This product works great. Truck rides as before without a load and fully loaded the sag in the rear went from 3.75" to less than 2" and rides and handles better under load. Only downside was that the brackets did not fit my truck, and I had to re-manufacture them to make them fit my stock truck.
Product is high quality, all parts fit well and I didn’t have to force anything. High strength thick steel, and the jounce bumpers are seriously heavy duty. I haven’t had a load on the truck (98 Ram 3500) since install a few days ago, so they haven’t touched the base plates yet.
One thing I’m concerned with is the jounce bumpers are touching and are right up against the lift blocks and U bolts. I’m unsure of the longevity these bumpers will have after a heavy load is on them and they are constantly rubbing on the hardware. Also, as the load gets heavier they expand outward as they flatten out so I’m also concerned with if that will push my lift blocks outward and mess with the suspension.
I’m prepping for a slide in camper and when I get it I will have to take a look and see what effects that weight has on the suspension, the bumpers, and ride quality.
Jimmy
1/5/2022
I am not sure when I will be able to have a load on it to confirm, as I do not have a camper just yet. I am currently working on upgrading the suspension in preparation for one. Is there an alternative similar solution, other than airbags - as I dont want those, that can be run? With a similar weight capacity? Kind of interesting Timbren hasnt run into this issue before with the older Ram 3500s. Wonder if this is somehow unique to my truck? All the rear components are original OEM, so it seems kind of strange.
Jenny N.
1/5/2022
You mentioned that the jounce bumpers were touching up against the lift blocks without a load in the truck and I wondered if you could send a picture of the installation?
Jenny N.
1/5/2022
I do have additional questions for you. Is the top picture showing how the springs look with a loaded weight? Have you already installed your slide in camper? I wanted to see if the top bracket were touching as well? The manufacturer is trying to determine if a smaller diameter spring would help or not
Jimmy
1/5/2022
Both pictures are right after installation with a completely unloaded bed. Since installation, I have not had weight in the bed, so I can not 100 say if the top brackets would touch the U bolts or leaf springs. But from looking at it just now, it appears the top bracket would just barely touch the U bolts with a loaded bed, and would definitely touch if there was side to side movement with a loaded bed like going over a speed bump, pot holes, or uneven terrain.
Jenny N.
1/5/2022
I did hear back from Timbren. Currently there is not a bracket that would be narrower that they can offer. When loaded if the brackets interfere with the smaller spring, then it may be advisable to return the kit.
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Leslie P.
10/23/2022
Thanks for asking! I still like the way this works on my truck, empty or loaded or towing heavy.