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  1. Vehicle Suspension
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  3. Jounce-Style Springs
  4. Rear Axle Suspension Enhancement
  5. Extra Heavy Duty
Timbren Rear Suspension Enhancement System
Timbren

Timbren Rear Suspension Enhancement System

Part Number: TGMRG25C
$269.36
Retail:$316.90
You Save: $47.54
Vehicle Suspension

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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 TGMRG25C can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TGMRG25C

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

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
    • 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. 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.



GMRG25C - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TGMRG25C Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Timbren Rear Suspension Enhancement System - TGMRG25C

Average Customer Rating:  4.7 out of 5 stars   (6500 Customer Reviews)

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:

Received a day ahead of schedule, packaging was in tach , installation was quick and simple . Have them installed but yet to load the pick up to see how they work or I would have given five stars



by:

Fast shipping products as described.



by:

Excellent product. Just what I needed. Etrailer great company to deal with very informative. Thank you.



by:

Fast delivery about 3 days easy to install and seems to work fine. Ride is a little stiffer with loaded trailer but not bad.



by:

Quick and easy install, haven’t hauled anything yet or towed my trailer but excited so put these to use!



by:

Easy install and noticable change in suspension performance. Makes a great addition if you are pulling a trailer or hauling loads.



by:

Everything arrived as promised been towing with the product a week or so really helps with truck Sway and bounce



by:

So easy to install. Just use supplied bolts to assemble the spring to the plate. Then use bolts from your bump stop to attach to the frame. Check your clearances and your done!



by:

Etrailer answers my questions and has always steered me in the right direction with excellent products.



by:

Bolted in like a factory part, i didnt require the entra spacers. No change in unloaded ride quality, but with 3000# in the bed the truck felt more stable. Im am very happy with it so far.



by:

This product was delivered quickly and efficiently. The quality of the product is excellent and look forward to seeing how they work when we are towing our trailer.



by:

These work great, highly recommend.



by:

Very easy installation took about 20 minutes. Set alarm inch to an inch and a 1/2 above my axle. For a 2021 Silverado 2500



by:

Easy installation and excellent shipping speed! Thanks ETrailer!



by:

Your company ships right away and very helpful web site easy to use have not installed yet but will let you know asap thanks for your help



by:

This is a excellent product. I had them in my F-250 and when I bought my new RAM it was the first accessory I added. Best bang for the buck suspension product on the market today!



by:

Definitely worked as advertised, very easy to install.



by:

Great product. I haven't installed this set on my new truck yet, but I had them on my older truck and they did the job they were intended to do. Only problem was when the package arrived, the box was split open to the point of everything falling out. But no parts were lost, this time.



by:

Perfect fit, easy to install, and they work as advertised. These are a nice improvement over the stock parts.



by:

The rear enhancement springs I ordered was exactly what I ordered. Thank you!!!



by:

The service and delivery of these suspension assist was an example of professionalism. I am grateful.



by:

Canot believes that it came from so far and did not even take 2 full days to cross the border all the way to a small town in the province of Quebec Canada 2 tums up for deleverer for the timbren product took 30 minutes to complete the job very easy took the pick up for a ride this morning did not see any difference in handling the truck was empty can't wait to see how good of a job they will do when pulling the fifth wheel next week thanks again



by:

They did not fit right on my 2021 power wagon, I had to modify to make them line up with my differential and had to buy shorter mounting bolts for the bracket plus they where already used



by:

Haven’t used them yet, it was an easy install, everything I needed.



by:

Product worked as described. Very easy installation for one person.


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See what our Experts say about this Timbren Vehicle Suspension

  • Comparing Timbren Rear Axle Jounce Spring Suspension Kits TGMRYS4 and TGMRG25C
    The two Timbren rear-axle suspension enhancement kits you referenced, part # TGMRYS4 and part # TGMRG25C, are both fits for the 2002 Chevrolet Tahoe, but kit # TGMRYS4 fits the 2-wheel-drive version while kit # TGMRG25C fits the 4-wheel. Both kits fit vehicles that do not have the Police Package and both install without drilling using included hardware. Both offer 6000-lbs of load support. Installation videos for both kits are linked for your reference.
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  • Recommended Timbrens For A 2009 Chevy Express 1500 Van All Wheel Drive
    For the front of your 2009 Chevy Express 1500 I recommend getting the Timbren #TGMFK15A. This will the 2WD, 4WD, and AWD models. We also have the # TGMRG25C available for the rear if you are in need. These will be a very easy bolt on install and will go a long way to level your ride and absorb road shock when towing.
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  • Highest Rated Suspension Enhancement Option For A 2003 Chevy Tahoe
    Hi Bob! The Timbren # TGMRG25C you ordered will have 6,000 pounds of load assist and will be the highest rated option available for your 2003 Tahoe. This will definitely solve your sagging issue, especially if you are close to or at the maximum load capacity of your vehicle. It must be pointed out, when you are unloaded your ride will be noticeably stiffer than your stock suspension due to their heavy duty nature. Personally, I prefer the Air Lift LoadLifter # AL60769 due to the adjustability....
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  • Timbren System Recommendation for 2005 Cadillac Escalade
    For your 2005 Cadillac Escalade the Timbren Kit part # TGMRG25C is a confirmed fit and will provide you with suspension enhancement at the rear of it to reduce the sag you have. These are a fit for your air ride model as well since your vehicle is all wheel drive.
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  • Recommended Suspension Enhancement System for 2004 Chevrolet Suburban
    For your 2004 Chevy Suburban, the Timbren Rear Suspension Enhancement System for 4x4 # TGMRG25C will give you load stability and support to help reduce sag. It also will help reduce body roll and will assist your vehicle suspension with absorbing shock. It will not turn your Suburban into a truck, but it will help it to drive and operate more similar to one. If you have a 2wd Suburban then you will want # TGMRYS4 instead which offers the same features but is a fit for 2wd vehicles.
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  • How Does the Timbren Rear Suspension Enhancement System Attach?
    Yes, there is a bolt that goes all the way through that holds the Timbren Rear Suspension Enhancement System item # TGMRG25C in place. I have linked the instructions and an installation video below so you can see the steps involved and all the tools and hardware needed.
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  • Weight Distribution and Suspension for 600 lbs Tongue Weight Trailer and 2001 Chevrolet Suburban
    With a 600 lbs tongue weight on your travel trailer, I recommend the # FA92-00-0800 Fastway e2 Weight Distribution w/ 2-Point Sway Control. This system is for a tongue weight of 400-800 lbs. Since you are at 600 lbs that puts your tongue weight right in the middle of the range which is ideal when using weight distribution. This has a bolt on installation so no drilling is required. As for heavy duty shocks and adding a leaf to your leaf springs, we do not carry shocks or an add-a-leaf...
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  • Suspension Enhancement Recommendation For 2014 Chevrolet Express Van
    To provide more support in your 2014 Chevrolet Express Van, I recommend the Timbren Vehicle Suspension, part # TGMRG25C. This will not affect the ride of your Express when empty but will help support the suspension when a load is added. The hollow rubber springs act like shock absorbers, and increase stability, along with extending the life of your suspension. This is a simple installation and replaces the axle bump stops on the frame. This system does not increase the weight carrying...
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  • Comparing Timbren and Firestone Vehicle Suspension Enhancement for a 2003 Chevy Avalanche 1500
    In terms of capacity, the Timbren Rear Suspension Enhancement System, # TGMRG25C, for a 2003 Chevy Avalanche 1500 has quite a bit more; a total capacity of 6,000 pounds. Compare that to the maximum 1,000 pound capacity of the Firestone Vehicle Suspension, # F4108. Both systems will offer similar benefits including helping to keep loads level, improved steering and balance, a better ride, and will prevent the vehicle from bottoming out. The Firestone system can be leveled side to side...
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  • Can SumoSprings Be Added To 2002 Chevrolet 4WD Tahoe With Front And Rear Timbrens In Place
    The first thing you will want to do is inspect your suspension system to make sure it is in good working order. If you have a weak suspension and relying on the Timbrens you already have installed, you will get more bounce than normal. The Timbrens are intended to help with a properly working system to help add support when carrying heavy loads. I called my contact at Timbren and they told me that adding additional support to the rear coil springs on your Tahoe like part # CSS-1094R will...
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  • Suspension Enhancement for a 2005 Chevy Express Van 1500
    Timbren springs # TGMRG25C and other jounce style springs will work to eliminate the sag of your van when it is loaded. It will also help when towing a trailer though weight distribution is better suited for that application. But since you want something for when towing and when not towing, going with Timbren springs would be the way to go. If the van is sagging when not loaded or towing then the have the suspension inspected first because suspension enhancement should only be used on...
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  • Timbrens or Air Bags for a 2008 Chevy Express 1500 Van
    The answer to your question depends on the weight of your cargo and your expectation of comfort in your 2008 Chevy Express 1500 van. The Timbren Rear Suspension Enhancement System item # TGMRG25C has a capacity of 6,000 lbs but will provide a stiff ride. I typically only recommend these systems as a last resort or on work trucks with service beds. I recommend going with an airbag system like the Firestone Ride-Rite Air Helper Springs item # F2423. This system has a 3,600 lbs capacity and...
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  • Timbren Springs Not Lining Up with Axle Bracket on 2004 GMC Yukon XL
    Is it the additional spacers that are causing the main part of the spring to out of alignment compared to the stock bump stops on your 2004 GMC Yukon XL? Are the Timbren springs fully seated in the bump stop cups? On these vehicles it is hard to manually push them into place. We usually use a block of wood and slowly put weight back on the axle so that the wood and the weight will push the springs into the bump stop cup. And I know you have the Z71 springs but is the Yukon itself 4-wheel...
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  • Height of the Timbren Rear Suspension Enhancement System # TGMRG25C
    I went and measured the overall height of the rubber springs of the Timbren Rear Suspension Enhancement System # TGMRG25C and found it to be 6-1/2 inches tall.
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  • Helper Springs for a 2007 Chevy Express Van 1500 AWD with Glass Pane Rack on Side
    The first thing you will want to do is make sure the suspension is in good working order. Helper springs cannot be added if the suspension is worn out or something is broken. Given the options for the rear of your 2007 Chevy Express van I recommend the Timbren springs. Timbren is headquartered up north so they know a thing or two about products that work well in colder climates and they have become a leader in the industry for helper springs. For the rear you can use # TGMRG25C. And for...
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  • Does Timbren Suspension Enhancement System Change Ride Height of 1998 Chevy Express Van
    Because the use of the Timbren Rear Suspension Enhancement System does not affect the empty ride height of the vehicle, you would be able to see no differences between a before and after installation photo. Once the vehicle is loaded to a certain point, the rubber springs that take the place of the factory bump stops will contact the axle and keep the vehicle from sagging further. The system greatly improves ride quality of loaded vehicles, and also helps reduce body roll that is felt during...
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  • Rear Helper Springs for 2002 Chevy Suburban 1500
    I'm assuming you're looking for a suspension enhancement product for your 2002 Suburban. Your best option would depend on what you're using the Suburban for. If you're wanting the suspension product to counteract sag experienced when a trailer is hitched, you'd be better served by using a weight distribution system. If you'd care to reply with some more information about the trailer you're towing, and its fully loaded and ready to tow tongue weight (see link for ways to determine this),...
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  • How To Prevent a 2009 GMC Savana Van From Sagging
    Yes, the Timbren Rear Suspension Enhancement System part # TGMRG25C which is a fit for a 2009 GMC Savana Van will reduce sag/squat therefore lift the ride height back to normal or if not normal, very close. The Timbren Rear Suspension Enhancement System is actually the most common solution to fix rear sag/squat as they not only work really well but are also easy to install and rather cost effective. If you were to ask me what I recommend, the Timbren Rear Suspension Enhancement System...
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  • Adding Timbren Suspension Enhancement System On a 2019 Yukon With The Magneride Air Suspension
    Adding any after market bump stop/jounce bumper could potentially raise the vehicle 1" because they are longer than the factory bump stop however, they are compatible with the Magneride system. Adding them can potentially effect how the vehicle rides when not towing and how the vehicles built in sensors for the air springs read the level of the vehicle. There are two types of bump stops/jounce bumpers available for the 2019 GMC Yukon 6.2L with the Magneride system. The Timbren Rear Suspension...
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  • Can Timbren Suspension Enhancement Fit 2003 GMC Yukon XL with Factory Air Ride
    The Timbren Jounce Springs # TGMRG25C are a fit for the 2003 GMC Yukon 1500 XL with Air Ride as long as it is the 4-wheel-drive version. These bolt on without drilling in place of the factory bump-stops. They work independently and offer progressive resistance as the load on them increases. I linked an install video for you. If you have the 2-wheel-drive version then instead you'll use part # TGMRYS4.
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  • Cost Effective Suspension Enhancement System for a 2009 GMC Savana Van
    The most cost effective suspension enhancement system we have for a 2009 GMC Savana Van is the SumoSprings Solo Custom Helper Springs part # SSR-204-40 for 1500 models or part # SSR-205-47 for 2500 and 3500 models. These two options are more cost effective than the Timbren Rear Suspension Enhancement System part # TGMRG25C but they will also not provide as much support although will still work to reduce sag/squat.
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  • Which Timbren Rear Suspension Kit Fits 1999 Chevy Express 1500 Rear Axle
    Yes, the Timbren rear suspension enhancement kit part # TGMRG25C does for sure fit your 1999 Chevy Express 1500 van rear axle.
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  • Helper Springs for a 2002 Chevy Avalanche Z71 with 6 Inch Lift
    Since the springs are longer than stock on your 2002 Chevy Avalanche air bags that fit inside the springs, such as # F4108 will not work. There are not spacers available that would work either. But I do have a solution for you. You could use Timbren springs # TGMRG25C for a 1500 or # TGMRSB4S for a 2500. Then you would need 8 of the 1 inch spacers, # A25723-90AH00, 4 for each side. Timbren does not recommend using any more spacers than that so there will still be a little travel before...
    view full answer...
    Image 1 for
  • Upgrading Trailer Hitch and Adding Timbren Helper Springs to a 2005 Chevy Suburban 4x4
    You can install a different hitch or suspension enhancement but the vehicle capacity is set in stone. Adding the above mentioned parts or other parts won't increase the capacity of the vehicle. The 12,000 pounds you see in the owner's manual is actually the gross combined weight rating. This is the most that the trailer and vehicle can weigh together and not the towing capacity of the vehicle. For the 1500 4x4 models if you have the 4800 motor with 3.42 rear end the maximum trailer weight...
    view full answer...


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