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Timbren Suspension Enhancement System - Severe Service - Rear Axle
Timbren

Timbren Suspension Enhancement System - Severe Service - Rear Axle

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Vehicle Suspension

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8,000-lb Capacity hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. Provides a comfortable ride by absorbing road shock and improving stability. Ideal for trucks with slide-in campers or an in-bed salt spreader. Great Prices for the best vehicle suspension from Timbren. Timbren Suspension Enhancement System - Severe Service - Rear Axle part number TGMRTT35D can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension

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

8,000-lb Capacity hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. Provides a comfortable ride by absorbing road shock and improving stability. Ideal for trucks with slide-in campers or an in-bed salt spreader.


Features:

  • Improves suspension, handling, and safety
    • Ideal for trucks with slide-in campers or an in-bed salt spreader
  • 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 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 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.



GMRTT35D Timbren SES with Aeon Hollow Rubber Springs - Rear Axle - Severe Service

Item # TGMRTT35D

Installation Details TGMRTT35D Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.5

735 reviews
8,000-lb Capacity hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. Provides a comfortable ride by absorbing road shock and improving stability. Ideal for trucks with slide-in campers or an in-bed salt spreader.

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Fast delivery second set for another truck very happy with them.



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See what our Experts say about this Timbren Vehicle Suspension

  • Comparing Timbren TGMRCK25D And TGMRTT35D For 2020 Chevy Silverado
    Hello Ken, thanks for reaching out. Both of the kits you mentioned, the Timbren # TGMRCK25D and # TGMRTT35D are correct for your 2020 Chevy 2500. The difference is the 25D is a standard duty kit, while the 35D is a severe service kit. The severe service kits are intended for vehicles with a constant heavy load in the bed like a truck bed camper, or salt spreader. They are designed to be constantly loaded. The standard duty kit is more suited for towing applications like travel trailers...
    view full answer...
  • How Does Lift Kit Spacer for Timbrens Fit into Kit that Fits 2019 Chevy Silverado 2500
    I attached a picture that shows how the Timbren # TGMRTT35D that you referenced gets assembled. The spacer # TA25722-90P00 you referenced would go between the numbers 2 and 3 and you'd be set. See attached picture. You will need to provide a longer bolt though so that it can all fit together. The same portion of the Timbren fits into the bump stop cup on your 2019 Chevy Silverado 2500HD.
    view full answer...
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  • Torklift Custom Frame-Mounted Camper Tie Downs on 2012 Chevy Silverado 2500 HD Ext. Cab
    Yes, the Torklift Custom Frame-Mounted Camper Tie Downs # TLC3212 fit your 2012 Chevy Silverado 2500 HD with Extended Cab and a factory receiver hitch. If you also need the Front Tie downs, the Torklift Frame Mounted Tie Downs for 6-1/2 ft bed are # TLC2220 and the 8ft bed # TLC2219 . If you're in need of new turnbuckles for your setup the TorkLift AnchorGuard Turnbuckles # TLS9013 are a great option. These are spring loaded in the front with spring tension indicators on the driver and...
    view full answer...
  • Does Timbren Suspension Enhancement Fit 2025 Chevy Silverado 2500 ZR2
    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,...
    view full answer...
  • Timbren Kit Recommendation for 2022 Chevy Silverado 3500HD with Slide In Camper
    Hey Ted, yes Timbrens would be a great option to add additional suspension support to your 2022 Chevy Silverado 3500. For that I would go with the part # TGMRCK25D though over the # TGMRTT35D as it would still give you the support you are looking for without being too harsh. The part # TGMRTT35D is a severe duty application which I would only recommend if you are basically at the capacity of your truck and won't ever really drive it without the slide in camper.
    view full answer...
  • Are Timbren Jounce Springs Good For Use When Hitch Towing On 2023 GMC Sierra 2500?
    The Timbren Suspension Enhancement # TGMRTT35D or # TGMRCK25D for your 2023 GMC Sierra 2500 can be used for either towing loads or bed loads. These are some of the more heavy duty suspension options we offer and will work best when you are carrying at your maximum towing capabilities. If you are hauling lighter loads and only towing on occasions you should consider using the SumoSprings # SSR-203-40-2. Their design and material provides for a more progressive compression which better...
    view full answer...
  • Difference Between Timbren Jounce Springs for 2019 Chevy Silverado 2500HD
    The biggest difference between the two parts is that the Timbren Rear Suspension Enhancement System # TGMRCK25D is a double-convoluted spring while the Timbren Rear Suspension Enhancement System # TGMRTT35D are single-convoluted springs. The single-convoluted springs are designed for service vehicles like tow trucks because they have less travel - they won't compress as much - than double-convoluted springs, making them more rigid for heavier-duty work. Due to this I highly recommend...
    view full answer...
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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...
    view full answer...
  • Recommended Timbren Suspension Enhancement For Slide In Camper On 2016 Chevrolet 3500 4WD
    I definitely recommend the Timbren springs over the Stableloads. I reached out to my contact at Timbren about the differences between the rear suspension models for your 2016 Chevrolet 3500 4WD and he said that the Timbren Rear Suspension Enhancement System # TGMRTT35D are definitely what you want for your Lance 950s application. He said that these rear springs are made specifically for slide in campers. They are designed to have more coverage than the # TGMRCK25D, and even though they...
    view full answer...
  • How Long Are the Timbren GMRTT35D for 2021 Chevy Silverado 3500
    The Timbren # TGMRTT35D are 5-9/16" tall.
    view full answer...
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  • Comparing Timbren Rear Helper Jounce-Style Springs for a 2019 Chevy Silverado 2500
    The difference between the Timbren Jounce Springs # TGMRCK25D and # TGMRTT35D for your 2019 Chevy Silverado 2500 is that the former is for standard pickup truck use while the latter is for Severe Service vehicles only. Since it doesn't sound like you have a Severe Service vehicle you need to use part # TGMRCK25D. They do have different weight ratings too but that doesn't change what they are supposed to be used for. The standard duty has a weight rating of 8,600 lbs while the Severe Service...
    view full answer...
  • Which Timbren Suspension Enhancement Product for 2019 Chevy Silverado 2500
    I'd be happy to help you with that. The Timbren # TGMRTT35D kit has an 8000 lb capacity, and is designed for super heavy duty applications like ambulances or tow trucks. For a regular pickup up truck, you'd want to go with the # TGMRTT35D.
    view full answer...
  • Comparing Timbren Rear Suspension Enhancement Systems for a 2019 Chevy Silverado 2500
    The difference between the Timbren Rear Suspension Enhancement Systems # TGMRTT35D and # TGMRCK25D is that the former is designed for service vehicles, like tow trucks, while the latter is more for the average user. Since you have a 2019 Chevy Silverado 2500 you want to go with part # TGMRCK25D. I have attached an installation video of this kit on a 2016 Silverado 2500 that you can reference as well as a picture showing what this looks like after the installation.
    view full answer...
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  • Comparing Timbren TGMRCK25D Or TGMRTT35D Rear Axle Jounce Springs For 2019 Chevy Silverado 2500
    I recommend the Timbren Rear Suspension Enhancement System part # TGMRCK25D which is designed for pick up trucks like the 2019 Chevy Silverado 2500 and has a 8,600 lb capacity. The Timbren Rear Suspension Enhancement System part # TGMRTT35D is designed for severe service vehicles and not pick up trucks.
    view full answer...
  • Comparing Timbren Helper Springs for a 2015 Chevy Silverado 3500
    Timbren helper springs # TGMRCK25D and # TGMRTT35D have different designs. The springs for kit # TGMRCK25D are double-convoluted. For optimal balance between softness and toughness, fabricators choose the double-convoluted rubber spring. Taller than the single donuts, these springs are engineered to deliver superior ride quality and significant load capacity. The springs in kit # TGMRTT35D are single-convoluted. When space is limited or extra stability is required, fabricators and engineers...
    view full answer...
  • Will The Timbren Suspension Enhancement System Fit A 2022 GMC Sierra 3500?
    Yes, the Timbren Suspension Enhancement System - Severe Service # TGMRTT35D will fit your 2022 GMC Sierra 3500. This system has an 8,000-lbs capacity that will increase stability, reduce rear sag, and will extend the life of your suspension. Attached is a product review video for you to check out as well.
    view full answer...
  • Compatability Between Timbren Suspension Enhancement # T68MR And Timbren Spacer # TGMRTT35D
    Yes, The Timbren Spacer # T68MR will work with The Timbren Suspension Enhancement # TGMRTT35D on your 2016 GMC Sierra 2500 per the manufacturer. The kit already comes with (2) one inch spacers in the package. You can use up to 1 inch more on the Timbren system if you use more then one inch the kit could bend. I attached a review video link below.
    view full answer...
  • Dimensions for the Springs in the Timbren Suspension Enhancement Kits for a 2013 Chevy 3500HD Diesel
    Once installed, the double convoluted springs from the Timbren SES Kit, # TGMRCK25D, will sit 5-3/16 inches below the jounce bumper holder on the frame. The outer diameter of these springs is 4-5/16 inches. The single convoluted springs from the Timbren SES Kit, # TGMRTT35D, are only 3-9/16 inches tall, but this kit also includes a 1 inch spacer, so it will sit 4-9/16 inches below the jounce bumper holder on the frame (see photos). The outer diameter of these springs is 4-1/4 inches.
    view full answer...
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  • Will Timbren SES In 2018 Chevy SIlverado 2500HD Fight Porposing When Towing 5th Wheel Trailer?
    Adding Timbren Rear Suspension Enhancement to your 2018 Chevrolet Silverado 2500 will help to eliminate the porposing or bucking you are experiencing when towing your 5th wheel trailer as they will add more support to the rear suspension of your truck. Now the difference between the Timbren # TGMRTT35D and # TGMRCK25D is the # TGMRTT35D is has a 8000lb load leveling capacity and the # TGMRCK25D has an 8600lb load leveling capacity. I recommend going with the # TGMRTT35D as it will give...
    view full answer...
  • Comparing Timbren TGMRCK25D or TGMRTT35D Rear Axle Jounce Springs for 2015 Silverado 2500
    Timbren rear-axle jounce spring kit # TGMRTT35D is intended for severe service vehicles such as tow trucks so for your towing/cargo application you will use kit # TGMRCK25D. This no-drill install is suitable for heavy-duty trucks like your 2500 whether or not it has factory top overload springs. Installation instructions and a video are linked for your reference.
    view full answer...
  • Recommended Rear Suspension Enhancement For a 2018 Chevy Silverado 2500HD Towing 5TH Wheel Trailer
    For your 2018 Chevrolet Silverado 2500HD towing a 5th wheel you will more likely want a selective rear suspension enhancement like the TorkLift StableLoad Suspension Upgrade w Quick-Disconnect # TLA7310S or Air Lift LoadLifter 5000 Ultimate Plus Air Springs # AL89338. As I doubt you will always have your 5th wheel trailer connected to your Silverado. Systems like the Timbren Rear Suspension Enhancement System # TGMRTT35D and Helwig often create a harsher ride when the truck is unloaded...
    view full answer...
  • Recommended Suspension Enhancement System for 2016 GMC Sierra 3500 Denali Dually
    The TorkLift StableLoad Suspension Upgrade for Upper Overload Springs, # TLA7202 are the fit for your 2016 GMC Sierra 3500. They will assist in reducing side to side sway as well as porpoising, and they will reduce body roll. They will reduce the squat of your truck. For another option to consider, I recommend the Timbren Rear Suspension Enhancement System # TGMRTT35D. These springs will work in a similar way but will use your jounce stops bolt location to provide the added strength...
    view full answer...
  • Recommended Timbren Jounce Springs 2020 Chevy Silverado 2500
    To help suspend payload carried in the truck's bed, I'd recommend using # TGMRCK25D, which are rated up to 8600 lbs. Keep in mind, these will NOT increase the manufacturer's stated suspension capacity. For a slide-in camper or salt spreader, using # TGMRTT35D is recommended.
    view full answer...
  • Comparing Timbren Rear Helper Springs for a 2019 Chevy Silverado 2500
    The Timbren Springs part # TGMRTT35D for the 2019 Chevy Silverado 2500 have a 8,000 lb capacity are designed for service vehicles such as tow trucks. The Timbren Springs part # TGMRCK25D have a 8,600 lb capacity but as designed for heavy duty pickup trucks. The springs for the service vehicles come with a spacer to take up extra space while installing the springs.
    view full answer...


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