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  1. Vehicle Suspension
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  6. Rear Axle Suspension Enhancement
Timbren Rear Suspension Enhancement System
Timbren

Timbren Rear Suspension Enhancement System

Part Number: TGMRCK25D
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$269.36
Retail:$316.90
You Save: $47.54
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 TGMRCK25D can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TGMRCK25D

  • Bump Stops
  • Towing/Load Leveling
  • 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 get a smooth, comfortable ride
    • Allows the leaf spring ample movement and cushions light loads
    • Becomes more rigid as more weight is added
      • Increases stability - gives you great performance when you are hauling heavy loads
      • Reduces vehicle 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 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 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 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.



GMRCK25D - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TGMRCK25D Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

4031 reviews
5 Stars
(3213)
4 Stars
(530)
3 Stars
(120)
2 Stars
(78)
1 Star
(90)
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:

Very good product.this is second set I have purchased.worked great on both trucks.good addition on half ton pickups.



by:

Looks like a well made product and if you have some metric tools install will be easy. I'm 77 and no metric tools, I was finished in about an hour and a half including clean up. Can't wait for the road test.



by:

Just got them yesterday haven’t put them on yet but seem very durable. No problem in the shipping either thank you



by:

Had these on a previous truck and was very happy with the simplicity and performance. Expect the same on this set.










by:

Product was as advertised. Problem was that after it arrived in San Diego it was sent to Ontario and then back 2 days later. Not a product problem but a UPS problem!



by:

Works ez install



by:

A great product and great service again.



by:

I have owned a couple sets of these on other trucks. Super easy to install and they definitely help stabilize the weight when towing.



by:

I have not used the product yet,but I can see the difference and I am sure that it will work. Like always your service has been great and fast.I thank you. Richard C.



by:

They were easy to install and work grea t!



by:

Works as it should



by:

We received this item in perfect time. We will be installing this soon. We have used these on other vehicles in our fleet and have been very happy with them. Thanks for a great product.



by:

They were easy to install, haven't had a chance to use them with a payload. I bought them to help my suspension when towing a fifth wheel.



by:

Easy to install. excellent product, haven't towed with them yet though.



by:

Easy to install and does an excellent j ob.



by:

Just install , only took about 45 minutes. Heading out this weekend and will see how they preform.



by:

Installed easy. Work Great. Have used them on my last 3 trucks.



by:

They were very easy and quick to install. First trip out with the travel trailer was successful.



by:

It was easy to install. Ride is a little stiffer but have not put a load on it.



by:

Awesome! Tammie was great. Super knowledgeable, and the kind of person that truly cares about why you called and WANTS to help with a solution! She not only helped with the initial call, but also sent a follow-up email to make sure I got my product. As for the product, I can’t wait to install it.



by:

Exactly what I was looking for, very easy to install.



by:

Great product and easy to follow instru ctions



by:

Very solid. Quality parts.



by:

Easy to install. You may need an impact wrench to break loose the u-bolts that have to be loosened.



by:

Easy install and work well on my 2500 S uburban


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4031
Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Suspension Enhancement for 2020 GMC Sierra 2500
    If you're towing most of the time then I would go with the Timbren Rear Suspension Enhancement System # TGMRCK25D. These will provide the most support for your 2020 GMC Sierra 2500 while towing your 5th wheel. If you're more concerned about ride quality then the RoadActive Suspension # RAS3611-HD would be the better choice. The Timbren has a tendency to be a bit rough when you aren't towing or hauling. If you want the best option possible I would go with the Firestone Air Bags # F2709....
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  • Timbren or Hellwig Load Pro for 2023 Chevy Silverado 2500
    Hey Uwe, I would definitely go with the Hellwig Load Pro 35 part # HE93XR over the Timbren. The Timbrens are notoriously harsh and bouncy and since that's not what you want I would definitely avoid them at all costs. Hellwig will give you the support and stability you are wanting while actually improving the ride quality instead of hurting it. I have another option you might be interested in too if you'd be interested in?
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  • Rear Suspension Helper Springs for a 2018 GMC Sierra 2500 Towing a 5th Wheel Trailer
    Hello, I will be happy to help you select some helper springs to improve the ride and level out the truck when you are towing. Timbren springs are an easy install but they will make the ride stiffer when you are not towing. The similar SumoSprings Solo # SSR-207-47 will also level out the truck but will not be as stiff when not towing compared to the Timbren springs. Another option to consider is RoadActive Suspension # RAS3611-HD. Installation is easy with this kit as well. It will...
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    If you were to use the 4 inch offset ball # BWGNXA4085 the pin weight on the ball will not be changed. What will change is where the weight is carried on the truck. Using the offset ball will put more weight 4 inches back from the center of the gooseneck ball hole in the truck bed. This may or may not affect the truck. Some things that could happen include reduced steering and braking and headlights angled upward. If the weight is far enough behind the rear axle it can lift the front...
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  • Lifted Truck Still Sagging with Equal-i-zer Weight Distribution System
    The adjustments for the Equal-i-zer Weight Distribution Systems like part # EQ37120ET will pertain to adding and removing washers from the head to try and get the spring arms as parallel with the trailer frame as possible. However, this may not completely level your vehicle. The majority of these systems are only designed to gain back half of what you lost and since your vehicle is lifted, there is an even greater chance that the vehicle will not be completely level. If you still seek...
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  • Compatibility of the Air Lift LoadLifter 5000 Springs on a 2016 Chevy 3500 Cab and Chassis DRW
    The Air Lift LoadLifter 5000 Helper Air Spring, # AL88339, is confirmed to fit the 2011 to 2015 Chevrolet Cab and Chassis 3500. However, my contact at Air Lift confirmed that the there are no air helper spring kits that fit the 2016 and on models. But I have a solution for you. We do carry the Timbren Rear Suspension System, # TGMRCK25D. This system will replace the OEM bumps stops located on the rear axle of your 2016 Chevrolet Silverado 3500 Cab and Chassis. The Timbren Aeon rubber...
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  • Can I Use Both The RoadActive Suspension Enhancement With The Timbren Suspension Enhancement?
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    I just confirmed with Timbren that the # TGMRCK25D DOES fit the 2025 Chevy Silverado 2500 Trail BOss.
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    Hey Jordan, Yep, I went ahead and verified directly with Timbren the Timbren Suspension Enhancement System - Severe Service # TGMRTT35D are indeed a fit for your 2025 Chevy Silverado 2500 ZR2. That said, the Severe Service kit is designed for trucks that have in-bed campers or are used as work vehicles (like salt spreaders, etc.). So if you have an in-bed camper you keep on this will be great, but if you want the suspension upgrade for things like helping stay level while towing a trailer,...
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  • Recommended Suspension Enhancement For A 2007 GMC Sierra 2500 With An In-Bed Camper
    Hi Mary, Do you leave the camper in the bed most of the time or does this truck spend a good chunk of time driving around without the camper? The SumoSprings Solo Custom Helper Springs # SSR-211-54 would be a great option if you leave the camper in the bed all the time. They take about 20 minutes to install and would just essentially replace the factory jounce stops for hassle-free, no-maintenance load leveling support. These have a 2,800lb capacity so they're be a bit stiff when the...
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  • Which Timbren Kit Fits 2013 GMC Sierra 2500
    Hey Lyn, the correct Timbren kit for your 2013 GMC Sierra 2500 is the part # TGMRCK25D. This will offer you quite a bit of additional suspension support for your camper.
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  • Why is Truck Fifth Wheel Towing Capacity Much Higher than Cargo Capacity
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  • Can Timbren Kit Also Fit with 2021 Chevy Silverado 3500 Air Bags
    The Timbren Rear Suspension Enhancement System # TGMRCK25D replace the factory bump stop on a truck, which unfortunately happens to be the same place as the air bag kits so you won't be able to install these together on your 2021 Chevy Silverado 3500. If your truck has the factory upper overload springs then an alternative option for you is the TorkLift StableLoad Suspension Upgrade # TLA7200. This installs to the sides of your leaf springs so it will fit with your air bag kit just fine.
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  • Recommended Spacers for a Timbren Suspension Enhancement Kit
    Welcome back! The Timbren Spacer Kit item # T68MR is exactly what you need. They have a 3/8" bolt hole opening that will work with the Timbren item # TGMRCK25D you purchased awhile ago. Timbren recommends a 1" gap between the jounce spring and your axle.
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  • Are Timbren Jounce Springs Good For Use When Hitch Towing On 2023 GMC Sierra 2500?
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  • Can I Use The Timbren Severe Service Suspension Enhancement On My Silverado 2500HD For Towing?
    You will be okay with the Timbren Rear Suspension Enhancement System # TGMRTT35D on your 2021 Chevrolet Silverado 2500HD. Them being the Severe Service means that they are capable of holding up better in the long haul with always having weight on them. When you are not towing with either them or the # TGMRCK25D they will not even be in contact with the axle. so the majority of your driving you will not even notice a ride quality difference. And when you are loaded both of the springs will...
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  • Dimensions of Timbren Rear SES for 2024 GMC Sierra 3500
    The Timbren Rear Suspension Enhancement System # TGMRCK25D is 5-1/4" tall x 4-1/4" wide. The height is 6-1/4" with the included spacer. This is confirmed to fit your 2024 Sierra 3500.
    view full answer...
    Image 1 for
  • Height of Timbren Rear Suspension Enhancement System # TGMRCK25D
    The overall height of the Timbren Spring Kit part # TGMRCK25D is 6-1/4 inches.
    view full answer...
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