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  1. Vehicle Suspension
  2. Timbren
  3. Bump Stops
  4. Towing/Load Leveling
  5. Extra Heavy Duty
  6. Rear Axle Suspension Enhancement
THIS ITEM IS NOT A FIT FOR
2009 Airstream Interstate Motorhome
Timbren

Timbren Rear Suspension Enhancement System

Part Number: TDR3500B
$398.07
Retail:$477.68
You Save: $79.61
Vehicle Suspension
Not Confirmed to Fit

2009 Airstream Interstate Motorhome

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6,000-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 Rear Suspension Enhancement System part number TDR3500B can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TDR3500B

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

6,000-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
      • 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: 6,000 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 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.



DR3500B - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TDR3500B Installation instructions

This Product Fits The Following Vehicles




Ratings & Reviews

4.7

3501 reviews
5 Stars
(2785)
4 Stars
(456)
3 Stars
(112)
2 Stars
(69)
1 Star
(79)
6,000-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:

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:

Fast shipping



by:

Easy install and work well on my 2500 S uburban



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:

Shipping was fast, product looks to be well made.



by:

Easy to install and does not affect the ride till you have a load, then they help support the load. Good product!



by:

as expected,fast shipping



by:

I have always had a good experience with doing business with you



by:

Quick service and as described.



by:

Great service and quick shipping



by:

As always amazing customer service and products to match.



by:

I just installed them yesterday. Super easy, took maybe 25 minutes. Looking forward to towing my toyhauler soon.



by:

Very easy installation!



by:

I'm very happy with the fast service. Timbren makes quality parts and now my problems are solved. I get a smooth ride and the truck does not sag . Thank you



by:

Great cost effective way to keep truck level. Easy install! A 15 minute job. Does not affect empty ride quality. Extremely happy with the product and etrailer.com



by:

Fast delivery and easy installation



by:

Showed on time and easy installation. This is why I continue to be a loyal customer.



by:

Great Product, arrived quickly and packaged well.

Will be buying from them in the future.



by:

These are the best add on suspension helpers I have ever had on a pick up. I put 2 yards of compost in the back of my 1/2 ton Silverado W/T long bed and it rode level back to the house. These control sag when you drop on a trailer loaded or not.



by:

Great Product, I've used them on many trucks through the years! Very easy to install.



by:

awesome sevrice EVERY time ive worked with these guys, really REALLY fast too... good guys



by:

Excellent communication and insane fast shipping!



by:

etrailer was very helpful in getting the products I needed quickly.



by:

Easy install and does what they say its suposed to! Do seem a little stiff, but time will tell as they break in. Stopped my rear end sagging issues with minimal expense, and repair time.



by:

Put them on my 2018 gmc 2500 and it rides like there is no trailer behind us. Well worth the price


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3501
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See what our Experts say about this Timbren Vehicle Suspension

  • Can B&W Gooseneck Trailer Hitch and Air Bags be Installed at the Same Time on a 1999 Dodge Ram
    As long as the air bag mounting brackets do not mount in the same place on the truck frame as the B&W gooseneck brackets then you can install air bags on a 1999 Dodge Ram. Firestone kit # F2071 would not work because it mounts on the outsides of the truck frame rails the same as the gooseneck brackets. Looking through the other air bag options for the truck all of them have upper brackets that would interfere. Another option is a Timbren set up # TDR1525H2. It can be used on a 1500 or...
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  • Will Upgrading Rear Anti-Sway Bar Help Reduce Body Roll on a 1999 Dodge Ram Pickup
    Upgrading the rear factory anti-sway bar with # RM-1129-122 will help reduce side to side body roll. This bar fits 2500 and 3500 series 4x4s only. Other option to reduce body roll is to install some suspension helper springs. If you have a 4x4 with standard height (no factory or aftermarket lift) I recommend # TDR1525H4 which will fit a 1500 or 2500 but not a 3500. For a 3500 use # TDR3500 for a 4x4 or # TDR3500B for 2-wheel drive models. For a 1500 with standard height and 2-wheel drive...
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  • Rear Suspension Enhancement Recommendation for a 1998 Ram 3500 Dually with Gooseneck Hitch
    I have a suspension enhancement solution for your 1998 Dodge Ram 3500 dually, but the two Firestone Ride-Rite Air Spring kit that we offer for your 1998 Dodge Ram 3500, # F2071, will most likely interfere with the frame brackets of your gooseneck hitch. This kit mounts on the outboard side of the frame rails just above the axles and most gooseneck hitches have frame brackets that mount on the outboard side of the frame. If your gooseneck hitch does not use frame brackets that mount to...
    view full answer...
  • Recommended Jounce Springs Suspension Enhancement for 1998 Dodge Ram 2500
    We do have an option for rear jounce springs that will work for your 1998 Dodge Ram 2500, although I checked with SuperSprings (the manufacturer of SumoSuprings), and there are no SumoSprings that fit a '98 Ram 2500. Instead, I highly recommend a similar spring, the Timbren Rear Suspension Enhancement System, and the correct one for your truck is going to depend on if your 1998 Dodge Ram 2500 is 2WD or 4WD: - 2WD: Timbren Rear Suspension Enhancement System # TDR3500B - 4WD: Timbren...
    view full answer...
  • Will Air Bags Work with the B&W Turnoverball Gooseneck on a 1996 Dodge Ram 2500
    I do have an option for you but there are not any air bag kits that will work with the B&W Turnoverball Underbed Gooseneck Trailer Hitch part # BWGNRK1394 on your 1996 Dodge Ram 2500. The next best option to help with towing a heavy trailer would then be with the Timbren Rear Suspension Enhancement System part # TDR3500B which will actually offer more support than air bags. They will also be easier to install and won't require any maintenance. These are a very popular option for truck owners...
    view full answer...
  • Which Suspension Enhancement Fits 1998 Dodge Ram with Draw-Tite Hide-A-Goose Trailer Hitch Installed
    If your 1998 Dodge Ram is a 2500, or 3500 (cab and chassis models only for the 3500), you can use Firestone Ride-Rite Air Helper Springs, # F2220, because this kit installs on the inside of the frame rail and will not interfere with the Draw-Tite Hide-A-Goose, # 9460-39, which installs on the outside of the frame rails. For a 1500, you can use SuperSprings Vehicle Suspension, # SSA5MTKT. I have included a link to the installation details for reference. For a 3500, you can use Timbren Vehicle...
    view full answer...
  • Recommended Suspension Enhancement for a 2002 Dodge Ram 2500 with 5th Wheel
    The Air Lift LoadLifter 5000 Air Helper Springs part # AL57230 will not interfere with most 5th wheel brackets. However, this kit is for a 2002 - 2008 Dodge Ram Pickup 1500 and since you have a 2002 Dodge Ram 2500 it will not work for you. Unfortunately, there is not an airbag kit that will work for your truck and not interfere with 5th wheel brackets but I do still have a solution for you. I recommend using the Timbren Rear Suspension Enhancement System as this will be your next best...
    view full answer...
  • Suspension Enhancement To Fit With B&W Gooseneck Hitch on 2001 Dodge Ram 2500
    I have a way for you to use suspension enhancement with the B&W Turnoverball Underbed Gooseneck Trailer Hitch # BWGNRK1394 installed on your 2001 Dodge Ram 2500 pickup but unfortunately none of the air bag kits that fit your truck are compatible with an in-bed hitch so there wouldn't be any brackets that fit. Instead I recommend checking out an alternative suspension enhancement solution like the Timbren Kit # TDR3500B for 2WD or Kit # TDR1525H4 for 4WD which replaces your OEM bump stops,...
    view full answer...
  • Suspension Enhancement Compatible With B&W Gooseneck on 1999 Dodge Ram 3500 Two-Wheel Drive
    I checked with Firestone and the Firestone Ride-Rite Air Helper Springs # F2071 are not compatible with the B&W Turnoverball Underbed Gooseneck Trailer Hitch # BWGNRK1394 on your 1999 Dodge Ram 3500; I then checked to see if any Air Lift springs were compatible and found that none of those air bags are either. The issue is the brackets will interfere with the hitch, as you noted, and moving them is not something you will be able to do as they will be positioned incorrectly, will likely...
    view full answer...
  • Suspension Enhancement System Compatible with Gooseneck Hitch on 1999 Dodge 2500 with Dana 80 Axle
    The Curt Double Lock, Flip and Store Underbed Gooseneck Hitch w/ Installation Kit # C60734 is a confirmed fit for your 1999 Dodge Ram 2500 but all of the air spring kits for your truck are not compatible with in-bed hitches from any manufacturer because of the mounting location. If you want to install a gooseneck hitch or 5th wheel hitch, I recommend replacing the Air Lift air bags with the Timbren Rear Suspension Enhancement System # TDR3500B designed for your Dana 80 rear end.
    view full answer...

Do you have a question about this Vehicle Suspension?


Info for this part was:

Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
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Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Mary K
Updated by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Michael B
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Michael B
Employee Carrie F
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Carrie F
Employee Lincoln B
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Lincoln B
Employee Jonathan Y
Video by:
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Employee Robert C
Installed by:
Robert C

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