bing tracking image
  1. Vehicle Suspension
  2. Timbren
  3. Jounce-Style Springs
  4. Rear Axle Suspension Enhancement
  5. Standard Duty
Timbren Rear Suspension Enhancement System

Timbren Rear Suspension Enhancement System

Item # TGMRG35
Retail:$438.91
Our Price: $373.07
You Save: $65.84
Vehicle Suspension

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

This item qualifies for Free Shipping
Shipping Weight: 9 lbs
Quantity: 
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
3,600-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 TGMRG35 can be ordered online at etrailer.com or call 1-833-496-1390 for expert service.
  • All Info
  • Reviews (4687)
  • Q & A (0)
  • Photos
  • Why etrailer?

Timbren Vehicle Suspension - TGMRG35

  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Timbren
  • Standard Duty

3,600-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 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: 3,600 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 truck's rear axle under a heavy load. The Timbren Suspension Enhancement System levels the vehicle.

When hauling heavy loads in the cargo area or by pulling a trailer, you will often see the rear of the vehicle 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 vehicle's weight as well. Because less weight is on the front axle, the front tires are making less contact with the road. Overall vehicle handling - traction, steering, and braking - is negatively affected. The resistance from Timbren's Suspension Enhancement System works with the vehicle's factory suspension to keep the vehicle level and improve your driving performance.


Diagram of the Timbren spring installed

The Timbren system has a vehicle-specific 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 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 provides increased resistance, stiffening the suspension and keeping the vehicle 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 the 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 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 helping 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 passing of a semi) because the movement from the trailer is not transferred to the vehicle. This also works to make the sway subside quicker.


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 as 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 - no air hoses are needed to be run, no compressors or gauges to hook up, and no manual adjustments necessary. The rubber construction causes Timbren's springs to be more elastic than similar products constructed of micro-cellular urethane. More elasticity allows for a more comfortable ride because the rubber has more travel.



GMRG35 - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TGMRG35 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Timbren Rear Suspension Enhancement System - TGMRG35

Average Customer Rating:  4.7 out of 5 stars   (4683 Customer Reviews)

3,600-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:
2017 Chevrolet Silverado 2500

The quality of the product is of top-notch.I installed it on a 2017 Chevy express 2500 cargo van with no load , install was very simple.picture with no load.will edit with picture and comments when loaded with equipment .




by:

Easy install, video was helpful. I'm extremely pleased with the ride and the fact I'll never have to air up my bags. Good trade up. Thanks for all the fallow up calls and info from Lisa with Etraier. I do recommend Timbren springs and Etrailer to anyone carrying heavy loads and or towing.


Comments
Still great
Mark D - 01/11/2018


by:
2014 Chevrolet Silverado

I had trouble with my browser called and spoke with Karen. She took my order. Then turns out I had two orders of the same thing. Karen took the time to call my home and ask is I really wanted two of the same thing. Great company, great customer service. How many companies in today's world would have made the extra effort.

This is the second pair of Timbren I have bought. I love them. Used them on a 2010 Silverado, and now on a 2014 Express Van. Not only help the 'bottoming out' effect, but great for stability during towing and when fully loaded.


Comments
After a year I still like them for heavy loads. I have found the bottoming out when hitting a bump with no load painful and uncomfortable. I actually cut two coil off them to allow the normal suspension to work when having no load. They still work for heavy loads. They are not the panacea for suspensions, but they definitely work when you have a heavy load.
Brayton - 08/11/2015


by:


Comments
Works really well in our Roadtrek camper van. Reduced sway from wind and trucks and mountainous road conditions. Very happy!
Glenn - 10/15/2022


by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


About a 1/2 inch difference in gap at the bump stop perch but still within parameters. Truck sits perfect with trailer attached. Haven’t towed yet. After towing if they perform like they should will upgrade to a 5 star. Easy to install, definitely needed 2x4 and jack. 2011 Silverado ext cab with 30 ft Genisis 5th wheel.




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I have used Timberns on 2 other vehicles, a Toyota 4Runner and an S10 Blazer with out complaint.

I transport RVs as a contractor for an RV transport company. My truck is 2021 Ram 3500 crew cab, 6.7 diesel.

Because the weight of the units is different with each unit I haul I wanted an easy, no maintenance solution to maintain as level a ride as possible. I haul both bumper pull and 5th wheel units. In addition to the weight of the unit I'm hauling I can carry 110 gallons of fuel with both the factory fuel tank and my auxiliary tank. Additionally, there is the weight of my Curt 25K 5th wheel hitch, Curt 14K equalizer hitch and bars, and approximately 300 pounds in tools.

I don't have to worry about airbags not inflating. The suspension settles about an inch before making contact with the Timberns. Squat while loaded is negligible. The ride empty is the same as it was before installation. The ride loaded is smooth and controlled even when hitting large bumps at highway speeds.

Installation was simple and straightforward. It took me about a half hour.




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


They definitely support and did lift my 2014 toyota tundra up about 1.5 inches.
This application with my weight has trunk riding on the cushions all the time.
That has teavel and bounce issues that do make some driving situations interesting.
I may go ahead and replace with airbags but for now support things well!




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Makes my truck feel better while towing a 5th wheel camper, especially over expansion joints of the expressway.




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I think I will be very happy with the ride when I tow our fifth wheel, it definitely needed the extra support especially on rough roads.I chose not to use the spacers because I like the softer ride when the truck is unloaded.




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


2022 Ram 3500, 30 minute install time, great product. Hooked up camper without sway bars and only squat 3/4 inch, where before 4 to 5 inches. Recieved product in 3 days with etrailer staff sending me numerous emails. Great job to etrailer staff. Thanks




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


The timbrens actually did what they were suppose to do. However, once I starter driving out west I notice the timbrens were riding on the axle which cause the speedometer to jump around depending on the road. I would recommend them if you are hauling or towing a camper or RV. I was going to contact etrailer about maybe removing a spacer for one set however the other set came as one unit. The bottom line is the Timbrens does stabilize your load for safe travels. I will be contacting etrailer soon to assist in correcting the problem...Road trip from Idaho,Colorado,Wyoming,and Utah were beautiful... Thank you etrailer




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I haven’t hooked up to the fifth wheel yet or else it might be a 5 star. Based on the 15 minute installation time and the price compared to air bags this appears to be a logical way to go. I will update this as I hook up and put a load on it.




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Haven’t had it on long, but so far so good. 1999 F350 dually. Bolted up nicely. Total job took 10 minutes. Have hauled two gooseneck loads of hay and truck drives SO much better. Nice and level. Money well spent so far.




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I have the timbren enhancement system on my 2020 canyon. I haul a trailer with Ranger that I pull about 250 miles to hunting camp. It tows great!




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


The Timbren rear suspension enhancement system helped with the truck swaying side to side when the slide in camper is on the truck.
The photos show right and left rear with Timbren’s installed (2 photos), with slide in camper on the truck (2 photos) and when the camper was removed (2photos).




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Installed these with only one issue, which was on the driver side rear axle. The axle had a ABS sensor cable bracket on the axle that need to be readjusted and trimmed down. The BumpStock was hitting this bracket on one edge. So actually, it's not and exact fit. But this issue is really a FORD placement issue of that cable. So just be aware that some extra work may be needed to install them. Passenger rear side install perfectly. Next is the drive to see how much better the coach drives, heard great reviews on that




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Great product, it works perfect on my truck. Sometimes I tow up to 30k lbs including my trailer and my truck stays level. No more high beam flashing in my eyes from drivers going in the opposite direction on the road.




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Worked great on our 2019 Honda Odyssey Elite to the East coast.Fully loaded with 4 people and a car top carrier,the Timbrens kept the van stable and level.
Sold the 2019 but took the Timbren system out and put them in our new 2022 Elite. Very easy to install, highly recommend.




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I used this on my Isuzu tow truck. The blocks in and of themselves are fine, they support the weight. Here's the problem: They are pre-loaded, meaning that they always touch between the frame and the rear axle. As you load the vehicle this puts more pressure on the frame in this 5" area where the blocks are. The springs have not yet taken as much weight as they normally would. Now, all this upward pinpoint pressure bends the frame. This is what happened to me on my rollback tow truck. After many hours and now double plating the frame all is well again, but a tremendous amount of work. Yes, the blocks are fine, but the result of installing this product resulted in a bent frame. The vehicle was not overloaded and was within the GVWR.


Comments
I have reached out to the manufacturer who will be reaching out to you.
-- Etrailer Expert Jenny N - 01/20/2022


by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I will say they are perfect for towing but when your not towing cause they are so close to the bottom it feels stiffer when not towing! They should make long enough so that it touches besides that these are perfect




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Too early to give a ride review but I received the TFFF53B fronts and the TFRF53A rears for my 2019 Fleetwood Southwind 35K while at a campground this week. Easy enough to change out while there. It is about.a 2 hour job to change out all 4. The front right took me the longest and you have to reuse the existing bolt. A washer should be provided because the hole in the bracket is almost as large as the bolt head. I will be placing a large flat washer there. The rears took less time to change.. I used the first and third slots in the mounting brackets and they actually put the unit more over the center of the axle than the original bump stops. Same was true in the front. No clearance issue or interference with my trac bar.


Comments
Have had these on my RV for over a year nowhere and I am completely satisfied. The fact that these always maintain contact with the axles greatly reduce body roll on turns and uneven roads.
Patrick - 11/07/2022


by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Very simple to remove and install. I took all of 15 minutes without even removing the wheels




by: 08/20/2022

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Easy r&r on our NV200
Attached photos
show the stock bumpers
alongside the newly installed Timbrens,
which exceeded my expectations. Use photos as
you wish. JW




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Couldn’t be happier with way they operate. I haul a 12,000lb 5th wheel trailer and helps tremendously with the handling and keeps my vehicle from sagging in the rear. Great idea and very reasonably priced.


Comments
Excellent, use them on a regular basis and still holding up great. They’ve been a great addition and also had a couple relatives add them to their vehicles.
Mike M - 08/27/2022


by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I really like these Timbren bump stops. I think the best thing about them is the simplicity, both how they work and how easy the install was. I bought these when I added a dump insert (similar to a salt spreader) into my 2019 F-250. I have loaded this truck heavy before with dirt and the truck sagged tremendously and had a lot of body roll. To prevent this with the now added dump insert, I installed these. Super easy to install! Took maybe 30 min. It reduces body roll and seems to improve the ride depending on how loaded the truck is.

One unfortunate consequence to the install is that the Timbrens brought to light that I have a weak leaf spring on my passenger side, which was suspect previously.

Overall, I'm very pleased with this purchase and would buy again!



25
3504
Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Removing Bump Stop to Install Timbren Suspension Enhancement # TGMRG35 on 2010 Chevy Express 3500
    According to my contact at Timbren, there is a bolt that holds the bump stop in place from above. Once the bolt is removed, the bump stop you described can be slid out of its slot and removed. As long as the weight bearing capacity of the van is not exceeded, using the Timbren springs will not effect your warranty coverage. Keep in mind that the Timbren springs will NOT increase the capacity of the suspension, but they will prevent the suspension from bottoming out.
    view full answer...
  • Timbren Rear Suspension for 2006 Chevy Express Van
    It actually really depends on what type of bumpstops you have on your 2006 Chevy Express 3500. You can simply choose from the following: Van 3,600 lb Capacity - # TGMRG35 Motorhome 3,600 lb with 1-Bolt Bracket - # TGMRG30 Motorhome 6,000 lb with 1-Bolt Bracket - # TGMRG30LB Motorhome 6,000 lb with 2-Bolt Bracket - # TGMRG30PL The part # TUR350 that you mentioned is a universal kit which will fit but it isn't a custom fit like the other options so I recommend using one of the custom options...
    view full answer...
  • Recommended Suspension Enhancement For Front Of 1985 Chevrolet G30 Van
    The Front Suspension Enhancement System that is designed to fit your 1985 G30 Van I recommend is part # TGMFG20. This system provides additional support and helps maintain stability when carrying heavy loads. No drilling is required for installation because this system is designed to replace the bump stops you currently have on your van.
    view full answer...
  • Recommended Improvement for Ride Quality 2012 Pleasureway Motorhome w/2011 Chevy Van Class B Chassis
    I can help you improve the ride quality of your 2011 Chevy Express Van Class B chassis on your 2012 Pleasureway Lexor MP Motorhome. If your experiencing sag in your rear then the Timbren SES system # TGMRG35 would be a solution for you, if your vehicle needed help being level. From the sounds of it you would like more of an improved ride quality with a steering stabilization and sway control instead of rear end sag. For better steering and sway control, I would instead recommend a...
    view full answer...
  • Rear Axle Suspension Kit for 2003 Chevrolet 3500 Express Cargo Van with Extended Box Frame
    The Air Lift website fit guide shows that for the 2003 Chevrolet Express 3500 on the commercial chassis there are two rear axle air bag kits, both of which fit the cutaway chassis with C-channel frame. My contact at Air Lift advised that for your 2003 Express 3500 Cargo van with extended box frame there is no kit offered. I also contacted the folks at Timbren, who make zero-maintenance rear-axle jounce spring kits, and my contact there confirmed that kit # TGMRG35 will work on your extended...
    view full answer...
  • Recommended Rear Suspension Enhancement For 2014 Chevy Express Van 3500 Box Truck
    You are correct that the Air Lift Loadlifter 5000 Air Helper Spring Kit # AL88205 you were looking at is only designed to fit Chevrolet Express Van 3500's with a fully boxed frame. Since your 2014 Chevrolet Express Van 3500 has a C-channel frame you will not be able to install this kit. It may be possible to box the frame in the location the springs mount, but this has not been tested so I cannot confirm. For an option that will 100% work I recommend adding the Timbren Rear Suspension...
    view full answer...
  • Rear Axle Suspension Kit for Roadtrek 210 on 2016 Chevrolet Express Van 3500
    For a rear axle suspension enhancement kit for your RV based on a 2016 Chevrolet Express 3500 you can review the items shown on the linked page. Click on either 2WD or 4WD to see suitable options. The nature of the handling issue you're having will help you choose the type of suspension kit you need. To smooth out road irregularities a jounce spring kit like Super Springs # SSR-205-47 or Timbren # TGMRG35 will support the rear axle when under load but will not alter your unloaded ride...
    view full answer...
  • Rear Suspension Enhancement Recommendation for 1981 GMC RV G3500
    Since we know your 1981 GMC Van is a G3500 we know the Timbren kit part # TGMRG35 is a confirmed fit that won't require any measuring or fabrication to install. The kit will fit as-is and works very similarly to how the SumoSprings kit works so you'd get the same amount of support.
    view full answer...
  • Improving Rear Suspension Ride Quality On A 2005 Coachmen Freelander Class C Motorhome
    If your Coachmen Freelander 2330 RK Class C Motorhome with a Chevy Express 3500 cab and chassis has 4WD then I recommend the Timbren Rear Suspension Enhancement System # TGMRG35. Timbrens are known for causing a stiffer ride when the vehicle is unloaded but you can mitigate the stiffness by decreasing the spacers used during installation to allow for a larger gap between the Timbren and the axle. Another thing to consider is the weight capacity of the Timbren's; this option is 3,600lbs...
    view full answer...
  • How Tall Is The Timbren Rear Suspension Enhancement TGMRG35 For 2017 Chevy Express Van?
    I had our warehouse measure the Timbren Rear Suspension Enhancement System # TGMRG35 you were looking at for your 2017 Chevrolet Express Van and the rubber portion measures 5-1/8" tall as shown in the included diagram. You can use spacers with these springs which are the 1/2" spacer # TA25722-90F00, or 1" spacer # TA25723-90AD00 though you should not need them unless you have lifted your van. If you need the spacers you will need to find a longer Grade 8 1/2" diameter T-Bolt from a local...
    view full answer...
    Image 1 for

Do you have a question about this Vehicle Suspension?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate vehicle suspension information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Joe V
Test Fit:
Joe V
Employee Mike L
Expert Research:
Mike L
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Jacob T
Video Edited:
Jacob T
Employee Zach D
Video Edited:
Zach D
Employee Chris R
Video by:
Chris R
Employee Jonathan Y
Video by:
Jonathan Y
Employee Mary E
Updated by:
Mary E
Employee Wilson B
Updated by:
Wilson B
Employee Carrie F
Updated by:
Carrie F
Employee Robert C
Installed by:
Robert C

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!
Call 1-833-496-1390