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  1. Vehicle Suspension
  2. Timbren
  3. Towing/Load Leveling
  4. Bump Stops
  5. Extra Heavy Duty
  6. Rear Axle Suspension Enhancement
Timbren Rear Suspension Enhancement System
Timbren

Timbren Rear Suspension Enhancement System

Part Number: TDR3500CA
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$398.07
Retail:$468.32
You Save: $70.25
Vehicle Suspension

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8,600-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 Rear Suspension Enhancement System part number TDR3500CA can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TDR3500CA

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

8,600-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
    • Becomes more rigid as more weight is added
      • Increases stability - providing great performance while hauling heavy loads
      • Reduces vehicle sag
  • Works independently - side-to-side
    • Helps compensate for off-center loads
    • Reduces body roll when swerving and turning corners
  • Acts as shock absorbers, taking the brunt of bumps and rough roads
    • Extends the life of your vehicle's suspension


Specs:

  • Includes 2 Aeon hollow rubber springs, vehicle-specific brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required
  • Capacity: 8,600 lbs
    • Do not exceed the vehicle's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Limited 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.



DR3500CA - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TDR3500CA Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

3621 reviews
5 Stars
(2863)
4 Stars
(485)
3 Stars
(113)
2 Stars
(75)
1 Star
(85)
8,600-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:

Helps to level the load when pulling my RV. Easy to install.



by:

Easy to install and took all the sag out of the rear end of my F250. Great product.



by:

Needed help with sagging when loading bed. This fixed that situation. I don’t notice they are there when truck is unloaded.



by:

does its job without any adjustments or thoughts from me.



by:

Took them off after a couple of trips. Ruined the quality of ride.



by:

The easiest install. 1/2 hour taking my time. Real test happens in a couple weeks, but I have no doubt of their performance.



by:

Excellent product. Delivers what it says. Rare these days. Two thumbs up from me.



by:

Easy install. Improved towing stability greatly



by:

Quick 20 minute install and made quite a difference!! Definitely worthwhile!



by:

It's been a great product. Helping with towing greatly.



by:

Install was easy, just need to raise the truck enough to have enough room between the axle and the Timbren to get a socket wrench in to tighten the bolt.



by:

Got the TGRCK 15S today was simple to install time it took was about 45 min
Easy directions to follow .great product.
No pictures just jacked up back of pick up and installed with no problems very easy.
Ray



by:

They help the truck ride so much better and takes the bounce out of the ride.



by:

Good product as usual. Helps with worn out springs and/or heavy loads



by:



by:

These items were easy to install and worked perfectly.



by:

awesome product. super fast shipping. great price. easy transaction. will do business again. A+



by:

The product performed well. I would recommend this product to anyone



by:

Great product. !!!!! works very well with load in truck.



by:

Installed in about a half hour and they work great. I got a bigger boat and these leveled out my truck. You can really feel them working.



by:

Awesome product vehicle rides great pullling the RV is awesome.



by:

Good product, simple to install. Works as it was intended to.



by:

Great product. Does exactly what it is made for.



by:

Ordered these for pulling camper, very good service from etrailer. Does what I wanted, would buy again. Thank You



by:

These worked great for my F150. Love them and would buy again!


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3621
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See what our Experts say about this Timbren Vehicle Suspension

  • SumoSpring VS Timbren for 2017 Ram 3500 for Ride Quality and 5th Wheel Towing Support
    Since you really want a good ride quality the SumoSpring Solo # SSR-312-54 is the way to go. This will give you the support you are wanting without making the ride quality harsh like the Timbrens do. Timbrens provide a lot of support but the ride quality (specifically unloaded) isn't great. The SumoSpring option is a much better balance between support and ride quality so it's what you'll be the most happy with.
    view full answer...
  • Should 2014 Ram 3500 Timbren Kit Have 1" Gap Between the Spring and Axle
    Hey Scott, thanks for reaching out! The Timbren Rear Suspension Enhancement System # TDR3500CA will need a 1/2" to 1-1/2" gap for proper installation on your 2014 Ram 3500. The only Timbren kits that have no gap are ones that are installed on a motorhome. What I recommend doing is installing the Air Lift LoadLifter 5000 Air Helper Springs # AL57295 kit instead because you get to choose how much support you get at any given time. To give you complete control I also recommend installing...
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  • Best 2024 Ram 3500 Timbren Suspension Kit for a Slide-In Camper
    Hey Jason, thanks for reaching out! The Timbren Rear Suspension Enhancement System # T94VR is the best Timbren kit for your 2024 Ram 3500 because the other Timbren kit, part # TDR3500CA, is designed for standard use while the T94VR is the severe service kit that works better for heavier applications like salt spreaders and slide-in campers. Are you planning on having the camper in most of the time, or is it a once every so often kind of thing?
    view full answer...
  • Towing Capacity of 2015 Ram 3500 Diesel Single Rear Wheel
    I looked up the payload capacity of your 2015 Ram 3500 single rear wheel diesel and it looks to be 4,140 lbs. So if you plan to carry around 4,000 lbs in the bed you should be fine. You'd also be fine to tow a 2,000 lb trailer as well.
    view full answer...
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  • Timbren Suspension Kit Recommendation for 2018 Ram 3500 Towing Heavy Fifth Wheel Trailer
    For your 2018 Ram 3500 that will be towing all the time very near the towing capacity the higher rated Timbrens part # TDR3500CA would be what I recommend as they can provide up to 8,600 lbs of support. This will give you the support you need and since it's not an air bag kit it will basically require zero maintenance and have a very easy install.
    view full answer...
  • Recommended Timbren Rear-Axle Jounce Spring Kit for 2011 Ram 3500 Dually Diesel Towing Car Hauler
    For your 2011 Ram 3500 dually diesel that is towing your 48-foot car hauler I suggest the Timbren kit # TDR3500CA. This kit will work with (or without) overload springs and its 8600-lb load rating means it will have the correct capacity to stiffen your rear suspension without creating new problems. The 8600-lb-rated kit # TDR3500CA will provide plenty of support to handle the substantial tongue weight of your enclosed car hauler trailer. I do not recommend the higher-rated kit # T94VR...
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  • Timbren Timbren Rear Suspension Enhancement System for 2016 Ram 3500 Mega Cab DRW
    The Timbren # TDR3500CA Aeon springs are a fit for your truck. According to Timbren, there was a manufacturing run that had weld spatter on the threads, but this was an isolated incident that occurred some time ago. The problem has been taken care of and doesn't affect any of our current stock. I've linked you to an installation video.
    view full answer...
  • Timbren Rear Suspension Enhancement For a 2023 Ram 3500 Dually Long Bed
    The Timbren Rear Suspension Enhancement System # TDR3500CA is the standard rating Timbren springs for your 2023 Ram 3500 Dually with an 8' bed. Do note these will not fit if you have the factory air suspension option. We also have the Severe Service Kit # T94VR which are rated for trucks which always carry heavy loads. So if you are only using the truck with towing heavy loads or installing a service bed these are the best option.
    view full answer...
  • Suspension Enhancement Option For 2005 Dodge Ram 3500 Cab & Chassis Dually
    Hi Robert, I checked with all of our manufacturers for you and there is not an air bag kit that is a fit for your 2005 Dodge Ram 3500 cab & chassis dually. There is one option that will work for your truck, which is the Timbren Rear Suspension Enhancement System # TDR3500CA. While Timbrens won't give you the more customizable load support of air bags, they'll still be an upgrade for your suspension. Reason why is they'll take the brunt of added weight at the rear of your truck from towing...
    view full answer...
  • Recommended Timbren Suspension Enhancement for 2019 Ram 3500 Dually
    For your 2019 Ram 3500 Dually Diesel I recommend the Timbren Rear Suspension Enhancement System # TDR3500CA. This jounce spring system is rated for up to 8,600 lbs and will progressively support your load by getting more rigid as more weight is added. It will act as a shock absorber and then as a stabilizer as weight increases to reduce body roll and sag. It won't increase your Ram's weight capacities but it will provide better support.
    view full answer...
  • Comparing Timbren Rear Suspension Enhancement Systems for a 2019 Ram 3500
    The correct Timbren Rear Suspension Enhancement System for a 2019 Ram 3500 is part # TDR3500CA. The Timbren Rear Suspension Enhancement System part # T94VR is for trucks with a constant heavy load like if you had a truck bed camper or service bed instead of standard bed. These springs are engaged constantly and not something you would really want on a daily driver. The capacity is a bit confusing I'll admit but rest assure, part # TDR3500CA is what you want for general use and towing.
    view full answer...
  • Correct Timbren Suspension Enhancement for a 2019 Ram 3500
    The correct Timbren Rear Suspension Enhancement System (SES) for your 2019 Ram 3500 pickup should be part # TDR3500CA because the other option, part # T94VR, is for Severe Service vehicles like tow trucks. This kit has an 8,600 lb capacity and doesn't require any drilling for the installation, but please note that it will not fit if you have the factory Air Suspension system. Another thing to remember is that this will not increase the weight capacity of your pickup as it is designed to...
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  • Timbren Suspension Enhancement for 2019 Ram 3500 Towing Fifth Wheel
    I have the perfect solution for your 2019 Ram 3500 for suspension enhancement. The Timbren kit part # TDR3500CA which is a custom fit for your truck gives you all the support you need without ever having to worry about air bag pressure or air leaks etc. Basically you install the kit once (easier than installing air bags) and then you never have to worry about them again which is really nice.
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    Image 1 for
  • Are Timbrens For 2022 Ram 3500 Compatible With 5th Wheel Hitch
    Yes, the Timbren suspension enhancement springs are 100 percent compatible with a 5th wheel hitch; there won't be any interference whatsoever. The correct Timbrens for your 2022 Ram 3500 are the following: - Timbren Rear Suspension Enhancement System # TDR3500CA I have added a cut out below of a customer who put the Timbren # TDR3500CA on their Ram 3500 for use with a 5th wheel hitch so you can see that others have had success with this set up. These will fit both a dually or non-dually...
    view full answer...
    Image 1 for
  • Required Axle Clearance for the Timbren Rear Suspension Enhancement System on a 2010 Ram 3500
    The clearance that you will want between your truck frame and the rear axle for the Timbren Rear Suspension Enhancement System, # TDR3500CA, is either approximately 6-3/4 inches or approximately 7-3/4 inches (see photo). Once the Timbren springs are installed, you will want about a 1/2 inch gap between the bottom of the spring and the axle on a one ton truck. The springs and the bracket measure 6-1/4 inches long and they come with a 1 inch spacer in case you need the additional length.
    view full answer...
    Image 1 for
  • Will Firestone Air Bags fit a 2016 Ram 3500 Cab and Chassis 4x4 Truck
    You are correct, the Firestone Ride-Rite Kit, # F2478, will fit your truck, but not if it has an in-bed hitch. The only reason for this is because the upper brackets for this kit mount on the outside wall of your vehicle frame, just above your axles and this is the same location that pretty much all gooseneck hitch brackets mount too as well. I have a suspension enhancement solution for you, but Firestone does not recommend stacking their brackets on top of other brackets at the frame....
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  • Which Timbren Suspension Kit Fits 2012 Ram 3500
    We have Timbren kits that fit your 2012 Ram 3500 but the # TDR3520 does not fit your truck. Instead the correct fit is the # TDR3500CA.
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  • Correct Timbrens for a 2016 Ram 3500 with Truck Bed Camper
    The correct Timbren Rear Suspension Enhancement System for a 2016 Ram 3500 with truck bed camper is part # TDRTT3500D as these were actually designed for this exact purpose. The other option part # TDR3500CA is just designed for standard towing applications.
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  • Suspension Enhancement for a 2004 Dodge Ram with Crane Installed in Bed
    For your 2004 Dodge Ram 3500 the suspension enhancement we offer that provides the most support is the Timbren kit part # TDR3500CA that provides 8,600 lbs of support. You can only use one suspension enhancement setup on a vehicle at a time so this would be your best option.
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  • Timbren Suspension Enhancement System Recommendation for 2017 Ram 3500 Crew Cab
    For your 2017 Ram 3500 the Timbren kit I'd recommend is the # TDR3500CA which will give you the added suspension support to fight the sag that you have and will work great.
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  • What if There is No Gap Between Timbren Rubber Springs and Axle on 2016 Ram 3500
    The Timbren Rear Suspension Enhancement System # TDR3500CA referenced in your question is confirmed to fit your 2016 Ram 3500. When the springs are installed, there should be about a 1/2 inch to 1-1/2 inch gap between it and the contact point when the truck is empty. If you find that the spring is almost or is touching the axle, Timbren recommends that you simply remove the rubber spacer that was supplied. If you have already done this, I recommend taking the truck out for a test drive...
    view full answer...
  • Timbren Rear Suspension Enhancement System for a 2012 Ram 2WD Regular Cab
    If your 2012 Ram is a 1500 model, I recommend the Timbren Rear Suspension Enhancement, # TDR1500DS. These springs have a 6,000 lb weight capacity and can be installed on trucks with or without overload springs and you do not need to install spacers. The weight capacity of these springs is more than enough to support your veterinary box in your bed. These springs work well with consistent loads. The Timbren springs, # TDR1500DQ, that you referenced were designed for the crew and quad cab...
    view full answer...
  • Rear Suspension Enhancement for a 2011 Dodge Ram 3500
    The Timbren Suspension system that you will need for your 2011 Dodge Ram 3500 is part # TDR3500CA. All the hardware needed for installation and instructions will be included with the Timbren suspension enhancement kit. Installing the Timbren systen involves raising the truck allowing the rear axle to hang and removing the OEM bump stops. Next, assemble the Timbren Aeon rubber springs and bracket. Mount the Timbren springs to vehicle. Finally, lower the vehicle. I have attached a copy...
    view full answer...
    Image 1 for
  • Gooseneck Hitch and Suspension Enhancement for 2003 Ram 3500
    The Firestone Ride-Rite Air Helper Spring # F2299 install on the bottom and inside of the bed frame rail as you stated. It does utilize the original bump stop location. You may also be interested in the shock absorber # F4350 that works in conjunction with these springs for an even better ride. The Timbren Rear Suspension Enhancement System # TDR3500CA is also a compatible fit with a gooseneck hitch and utilizes the same location. For your gooseneck hitch, I recommend the B&W # BWGNRK1313....
    view full answer...


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