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  1. Vehicle Suspension
  2. GMC
  3. Sierra 2500
  4. 2018
  5. Timbren
FITS 2018 GMC Sierra 2500
Timbren Rear Suspension Enhancement System

Timbren Rear Suspension Enhancement System

Item # TGMRTT35D
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Retail:$438.91
Our Price: $373.07
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Vehicle Suspension
Confirmed to Fit
2018 GMC Sierra 2500

2 Wheel Drive

4 Wheel Drive

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Shipping Weight: 6 lbs
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The best technical support and full vehicle suspension installation instructions. Lowest price Sierra 2500 vehicle suspension guarantee and expert service. GMC Sierra 2500, 2018 vehicle suspension by Timbren are available from etrailer.com. For expert service call 800-298-1624 to order your Timbren Rear Suspension Enhancement System part number TGMRTT35D, or order online at etrailer.com.
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2018 GMC Sierra 2500 - Timbren Rear Suspension Enhancement System

  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Timbren
  • Extra Heavy Duty

8,000-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your GMC Sierra 2500. 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 get a smooth, comfortable ride
    • Allows the leaf spring ample movement and cushions light loads
      • Rides just as smoothly when you're not hauling a load
    • Becomes more rigid as more weight is added
      • Increases stability - gives you great performance when you are hauling heavy loads
      • Reduces rear sag
  • Works independently - side to side
    • Helps to compensate for off-center loads
    • Reduces body roll when you have to swerve or execute a sharp turn
  • Acts as shock absorber, taking the brunt of bumps and rough roads
    • Extends the life of your suspension
  • Includes 2 Aeon hollow rubber springs, custom-fit brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required


Specs:

  • Capacity: 8,000 lbs
    • Do not exceed your vehicle's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Limited lifetime warranty - satisfaction guaranteed


An example of sag on a truck's rear axle under a heavy load. The Timbren Suspension Enhancement System levels the vehicle.

Whether you're hauling heavy loads in the cargo area or by pulling a trailer, you will often see the rear sag while the front end rises. In these cases, the rear axle is handling not only the weight of the cargo, but more of the truck's weight, as well. 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 has a custom-fit bracket that will be 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, one inch 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 the truck level.


Timbren suspension system works to prevent body roll

Each hollow rubber spring works independently to support the driver's 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 the truck. 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.


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.



GMRTT35D Timbren Rear Suspension Enhancement System

Installation Details TGMRTT35D Installation instructions


Customer Reviews

Timbren Rear Suspension Enhancement System - TGMRTT35D

Average Customer Rating:  4.7 out of 5 stars   (3939 Customer Reviews)

8,000-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.

- TGMRTT35D
by:

Work great. Offer stability, especially in corners. Do not provide for a level truck as the weight of the camper still compresses the springs up to where the Timbrens engage, but I knew that going in. Alternative to full-on air leveling systems.



- TGMRTT35D
by:
2022 GMC Sierra 2500

Very easy install. Didn’t want airbags. This is perfect for towing my 4 horse gooseneck trailer.



- TGMRTT35D
by:

I've been using these for a month now. I decided to give these a try instead of air bags. So far I've been please, Yesterday I had 2,500 of tongue weight (I have a scale on my hitch, it's super handy btw) on my 2021 2500HD and it handles very well. These didn't allow the truck to sag, so the truck bed was fairly close to level (so a very slight sag). But without these, my front end would've looked like it was way higher then the front. So far, I'm a believer in this product, 10 minute install and your set



- TGMRTT35D
by:

I’ve had Timbrens in the front of my last two trucks for plowing and I have been more than pleased. The truck rides just as well. I decided to get a set for the rear of my 2020 Silverado 2500HD to help with my gooseneck equipment trailer and truck camper. Installation was a breeze, maybe 10 minutes for both sides. I highly recommend them, and I highly recommend etrailer.



- TGMRTT35D
by:

Great product needed spacers and longer bolts called them and they sent them right away, excellent service will do business with them again



- TGMRTT35D
by:

The product was easy to install and has been great I would buy them again I would definitely recommend them



- TGMRTT35D
by:

Extremely "easy" to install. Took me almost longer to get my jack, some boards together and soap than it did to install this product. Shipment came quicker than I paid for it to come. Wow! Very pleased with Samantha's customer service!



- TGMRTT35D
by:

The complete experience was great, from picking out the part to receiving it on time and even to putting it in.



- TGMRTT35D
by:

Waiting to see how they do with my 5th wheel rv. Easiest install I've ever done.



- TGMRTT35D
by:

etrailer never disappoints. Installation was easy, did not have to raise truck axle per directions. A small amount of bearing grease worked better than the recommended soapy water. Cannot comment on effectiveness yet as I am still awaiting delivery of our new truck camper...more to follow.



- TGMRTT35D
by:
2021 GMC Sierra 3500

I have purchased a lot of things from etrailer and they never disappoint. The products are always as they say they are and the shipping is above average; meaning most of the time is before the quoted time of delivery. The Timbrens went right on no problems. Thank you etrailer!



- TGMRTT35D
by:
2015 Ram 3500

Arrived fast and installed in about an 30 minutes. Removed the old bump stops with couple screwdrivers. For the new install, don't waste your time with soapy water (I tried it)...just use liquid soap without the water...worked way better. Coat the entire top and 1/4 inch down the side to the first indent. I used a flat 15 inch pry bar to help push them in. I then jacked the truck up and put a piece of wood between the stop and the axle and lowered it. Helped seat them fully. Installed on a 2021 Chevy 3500 4x4 dually.



- TGMRTT35D
by:

Super Easy to install. Really helps with stability on the road when I have my truck camper on. Would definitely recommend!



- TGMRTT35D
by:
2014 Chevrolet Silverado 2500

Etrailer provided me excellent service. One of my Timbren bump stops was lost due to my fault. I needed another set very quickly. They made sure they were shipped promptly and followed through to make sure that I had them in time. Excellent customer service, and unlike amazon I was able to speak to real people who cared.



- TGMRTT35D
by:

Got excellent coaching on the proper part for my 2020 GMC 2500 HD. The new horse trailer did not exceed the the weight limits, but squatted the back end more than I wanted. These new bump stops worked perfectly. Install was easy, and the truck rides like normal without load and rides better with load, so its a win win. Thanks for the quick shipping, follow up, and always having great reviews to read when selecting parts to purchase. THANK YOU ALL at "etrailer"...



- TGMRTT35D
by:
2011 Ram 2500

Adds just the right additional support for the heavier fifth wheel as the truck approaches it's maximum load. 2500 HD Duramax. Simple instructions and easy to install.



- TGMRTT35D
by:
2016 Chevrolet Silverado 2500

It made about a two inch difference in the way my truck was squatting down under a trailer. So far so good



- TGMRTT35D
by:
2018 Chevrolet Silverado 3500

the timbren pucks went pretty easy, however i had to use a 2x4 plus a 1" board to set the pucks.



- TGMRTT35D
by:

Great product! Sold on it after hitching up the first time. Mrs Hally took care of my order and got it to me the next day. Was a great experience with the etrailer & timbren products. Will order from again. Thanks.



- TGMRTT35D
by:
2021 GMC Sierra 3500

Easy install and nice product



- TGMRTT35D
by:
2014 GMC Sierra 3500

Works as noted...



- TGMRTT35D
by:



- TGMRTT35D
by:
2015 Chevrolet Silverado 3500

Receved my order in a very timely manne r.



- TGMRTT35D
by:



- TGMRTT35D
by:


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Tyler C
Written by:
Tyler C
Employee Jeff D
Installed by:
Jeff D
Employee Robert C
Installed by:
Robert C
Employee Mary E
Updated by:
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Employee Wilson B
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Employee Jonathan Y
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