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

Timbren Rear Suspension Enhancement System

lowest price pledge
Retail:$265.18
Our Price: $225.40
You Save: $39.78
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: 5 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
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. Lowest Prices for the best vehicle suspension from Timbren. Timbren Rear Suspension Enhancement System part number TGMRCK15S can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (3491)
  • Q & A (147)
  • Photos
  • Why etrailer?

Timbren Vehicle Suspension

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

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 have a smooth, comfortable ride
    • Allows the leaf spring ample movement while cushioning light loads
      • Does not affect the empty ride of the vehicle
    • 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
  • Includes 2 Aeon hollow rubber springs, vehicle-specific brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required


Specs:

  • Capacity: 8,600 lbs
    • Do not exceed the vehicle's weight-carrying capacity
  • Limited lifetime warranty
  • Satisfaction guarantee


Reduced rear axle sag with Timbren suspension enhancement

Whether you're hauling heavy loads in your bed or cargo area or 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 vehicle 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 your rear axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down to where the bottom of the leaf 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.


Action 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.


Trailer swaying as it is towed behind a truck

Because your 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 SES

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.



GMRCK15S - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Replaces Timbren TGMRCK15E

Item # TGMRCK15S

Installation Details TGMRCK15S Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Timbren Rear Suspension Enhancement System - TGMRCK15S

Average Customer Rating:  4.7 out of 5 stars   (3488 Customer Reviews)

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.

- TGMRCK15S
by:

This Rear Suspension Enhancement kit were so easy to install, I was almost sure I missed something. They installed in less than an hour. I was able to place my floor jack under the ball mount to raise the rear end enough to remove the old mounts and simply install the new ones. Hooked up my 28' rv to my Silverado 1500 and they worked as advertised. No front end sag and I feel safer towing it. Customer service helped me find the right product I needed without dishing out a lot of cash!


Comments
While I have sold this vehicle since this review to my neighbor, she has told me she loves this product when she pulls her rv. I now have a 34 ton pick up and purchased a set for it. I am very satisfied with the Enhancers i purchased for it!
Frank R - 06/19/2021


- TGMRCK15S
by:
2021 GMC Sierra 1500

I just installed these on my 2021 GMC Sierra 1500 AT4. It was really easily done and only took .5 hour total. Because the AT4 is slightly lifted I did use the spacers review separately. I am towing a pretty heavy 2 axle horse trailer with a tongue weight between 6000 and 7000 pounds which the truck can handle. When I hitched up with the original bump stops the hitch dropped 4", the frame over the rear tires squatted down 2 and 3 quarters " and the frame over the front tires lifted 3 quarters". After the installation the hitch dropped only 2 and 3 quarters", the frame over the rear tires squatted down 1 inch" and the frame over the front tires lifted . Test drive went well with the same smooth ride with no load as there is no contact. Pulling the trailer went just perfect, no sway due to the trailer design, and the load was very stable with very little bounce.



- TGMRCK15S
by:
2019 Chevrolet Silverado 1500

Real nice product. Added them to my 2019 Silverado to better support my 6000 Lbs Travel Trailer. They are a big improvement over the stock bumpers.



- TGMRCK15S
by:
2013 Chevrolet Silverado

From Mickey Mouse to Mighty Mouse in minutes. Pulling a 7700lb travel trailer with a 2013 Silverado w/ tow package and h/d cooling. Even with W/D hitch truck was bouncing uncomfortably. The Timbrens were an instant fix. Dips in the road are no longer a problem, and I think the sway control in the hitch seems to feel more solid as well. Unloaded ride is unchanged except for really major dips (and Texas roads have a few). If you are like me and take your truck to places your Mom would not recommend, a good underbody wash and glasses to catch any falling junk during the install are highly valued


Comments
Still a happy camper after a year, and rolling along comfortably. Towing time has increased and timbrens still smooth.
Larry S - 10/17/2017



- TGMRCK15S
by:

Even using equalizing bars, I was experiencing "motorboating" when towing our travel trailer. I've had several air bag setups in the past and have always had to add air daily, so I bought the pair of Timbren suspension enhancement blocks. Mounting took about 20 minutes. The Timbren blocks stopped the "motorboating." Another benefit, is my ride stays as factory without messing with air pressure at all. Also, now I'm able to move my travel trailer short distances without installing the equalizing bars at all. My pickup stays nice and level.


Comments
The Timbren blocks are working out great! The only negative is that there is only a couple inches of freeboard travel brfore the axle contacts the blocks. When there is no load, bumps like speed bumps are a bit harsher than before. I guess that is to be expected though. Even with this slight increase in unloaded harshness, I still give this product five stars.
Mark V - 06/07/2021


- TGMRCK15S
by:
2016 Chevrolet Silverado 1500

Product is perfect, delivered in good order and a fair and reasonable price. Much easier to use than other systems available such as air bags. All good, all work, but in this application this product is perfect for my needs.


Comments
As described, but for a half ton with Max Tow package, I should have done the air bags, as even light loads are maxed in regular driving. Perfect for when towing the RV.
Steve S - 05/11/2021


- TGMRCK15S
by:
2020 GMC Sierra 1500

I can't wait to use these and see how they actually work with my 29' x 7.5' wide snowmobile trailer. For reference to those with an AT-4 GMC, I have a 2020 and with a 1/2" spacer and the timbren (it was actually only 4 1/2" tall, not 5" like the images showed) have about 1.25" gap between the bottom of the timbren and the axle stop when unloaded. I was under the impression that the timbren itself was 5" based on the image in the kit on the website, #tgmrck15s, so I'm a 1/2" shorter than I wanted but I will run it for a while and see how it looks when loaded with my trailer before going any thicker with a spacer.



- TGMRCK15S
by:

I was worried about getting a bumpy ride after installation like some of the reviews stated. I'm happy with my purchase, these timbren suspension did not disturb ride quality.



- TGMRCK15S
by:

I have a 2018 GMC Sierra 1500 pick up truck (elevation package) in which I added a 3.5 inch ROUGH COUNTRY KNUCKLE LIFT KIT with Front Struts. The rear distance between the bump stop's metal cup just under the frame and the the rear axle is 8.25 inches with an empty truck bed and a quarter tank of gas. I gave the professional this information on my truck and what I needed; they e mailed back the kit with only 1.5 additional spacers on each side of the truck, Ok. I still came up with 2.25 inch space with an empty truck bed on both sides. I feel More TIMBREN PRODUCTS WOULD be SOLD if websites carried information All together for the average people to buy at their finger tips. It would have been easier for me if the following were all grouped together for my truck : TIMBREN Rear Suspension Enhancement System TGMRCK15S (that has 3/8 bushing) which is actual about 4.5 inches not 5inches in height. FOR TRUCKS with LIFT KITS spacers are required with the same 3/8 bushings 1 inch spacer (that has 3/8 bushing) A25723-90AHOO 1/2 inch spacer (that has a 3/8 bushing) TA25722-90POO I required an additional 1 inch spacer on both sides than I was e mailed. It would also be easier if I could buy the additional bolts grouped with my additional 2.5 spacing on both sides of my truck on the web site, than going to the hardware store. I would pay the additional cost. So all together for my 3.5 ROUGH COUNTRY LIFT, I required 2.5 inch spacers on both sides with the 4.5 height kit which = 7 inches . I haul my 4 wheeler in the bed and broke a level spring years ago. On other occasions I place fire wood in the truck bed. TIMBREN is the way to go, it will be there when I put weight in the bed of truck; be it a 4 wheeler or wood. Friends of mine have air bag systems that leak over time and are much more in price. You can not go wrong with TIMBREN. When installing, remove salt and sand near top of original bump stop bolt, apply PB blast wait 10 minutes use a breaker bar with easy removal. Go to the hardware store to get longer bolts. When installing have to jack up the back of the truck under the towing package to get space to use tools to add new TIMBREN PRODUCTS.



- TGMRCK15S
by:

Didn't like the ride at all, didn't really help my truck. Had it on for 1 day then went back to stock. Very rough ride, didn’t matter if I was pulling a trailer or not. Used them very little,they’re sitting on my shelf. What a waste of money.


Comments
Thank you for your review. The Timbrens are made of dense rubber and designed for heavy duty applications so they can create a rougher ride if there is not weight on them. You may consider trying the SumoSprings part # SS45MR
SumoSprings Solo Custom Helper Springs - Rear Axle
$265.99
which are designed to compress easily under a lighter load.
-- Etrailer Expert Heather A - 07/03/2021


- TGMRCK15S
by:

I bought the wrong product--these did not solve the problem I was faced with--no fault of Timbren. They did work as designed, and were easy to install. I had hoped they would help control the galloping problem I was having when towing my travel trailer--but instead they caused a noticeable "thump" every time we went over a bump or an undulation in the road while the galloping continued. I simply did not have enough rear suspension to handle the trailer tongue weight (even though I was within payload limit at the scale). Solution turned out to be a bigger truck, lesson learned.



- TGMRCK15S
by:
2011 GMC Sierra

Added these Timbrens with two 1" spacers on each side on a 2011 GMC Sierra with a 2" lift. Fit great, easy to install. Was more work getting old bump stops off than installing the new Timbrens with spacers. I did need to get 2" longer bolts than what was included to complete the install, but that was to be expected.



- TGMRCK15S
by:
2014 Chevrolet Silverado

I have a 2014 Silverado 1500 and 24’ gooseneck weekender horse trailer. I just got the trailer and the guy I got it from recommended the Timbren’s to me. When I first dropped the trailer on my truck empty it squatted me 4.5” in the rear. The trailer weighs just under 5,000 pounds empty. When I first pulled the trailer empty I wasn’t sure about the Timbren’s they seemed really bouncy on my road. My road is not the smoothest road though. This past weekend I loaded 3 horses into my trailer and traveled about 1.5 hours away and I was blown away at how well my truck drove and handled fully loaded. With the Timbren’s my truck barely squats now. The trailer rode a hundred times better loaded with horses, which most big trailers ride bad when empty anyway. As far as driving with no load at all the truck rides just like normal. However if you hit a big hump in the road sometimes it will be enough to make it hit the Timbren’s and gives a little jolt. As far as recommending I definitely recommend these especially if you have a 1/2 ton truck and pulling a fairly heavy load.



- TGMRCK15S
by:
2015 GMC Sierra

Received yesterday (quick shipping!), installed today on 2015 GMC Sierra 1500 4WD Crew Cab short box. What a difference between the Timbren's and OEM bump stop from GMC. Installed for towing large travel trailer. Used floor jack under rear hitch to raise up truck to get enough room for socket to install bolts. Use 10mm socket to remove OEM bolt & bump stop, use 17MM socket to install new bolt and Timbren. Very east installation process.



- TGMRCK15S
by:

Etrailer expedited the package early due to returning customer. Parts delivered in double packaged boxes. Installed in 1/2 hour after fighting the old rusty bolts. Have not had a chance to load test yet. Will give another follow-up review after truck and trailer are loaded.



- TGMRCK15S
by:

I took them off...and put air bags in. I didn't like the truck bottoming out even when empty. I wish I new someone that could use them.


Comments
Thank you for the review! Some people do say that Timbrens tend to ride a little more rough than an air bag kit. If you were consistently bottoming out though you might want to make sure that your OEM suspension is in good working condition and that you arent exceeding the weight rating of your vehicle since SES doesnt increase capacity.
-- Etrailer Expert Jon G - 07/15/2021


- TGMRCK15S
by:

These things are great! They ride smoothly when I tow my 29ft 5th wheel. I added the 1 inch spacers because of my 2 inch lift. I have about 1 1/4 inches of clearance when I don’t have any load. I like this better cause I never hit the Timbrens when I tow a lighter load like a boat or small trailer. I had Timbrens in my old truck and had about 3/4 inch of clearance and I could feel them touch with a light load or even a bigger bump in the road



- TGMRCK15S
by:
2015 Chevrolet Silverado 1500

If your rear torque lift camper tie downs were not so expensive I would buy some of those also.but I think almost 400 is way to much money so I will buy some from a different company



- TGMRCK15S
by:
2008 Chevrolet Silverado

I installed the Timbren jounce bumpers on my 08 Silverado to aid in trailer towing. They definately stopped any tendency to porpoise in conjunction with my Curt hitch. They also leveled out the combination truck and trailer. The only downside(?) is that the wife complains about the bouncy unloaded ride due to the fact the bumpers do not have a lot of clearance from the axle, she said it rides like a truck 8>). The install was fairly easy, it was harder to remove the old bumpers than it was to install the Timbrens'.


Comments
The Timbren bumpers have continued to perform as originally stated. They are jolting to drive with unloaded. I will probably change them out for the Firestone air bags later to soften the load, as I do not trailer, or load heavy enough, to need them full time.
Ronald E - 06/27/2020


- TGMRCK15S
by:
2014 Chevrolet Silverado 1500

Great product easy to install, took me longer to take the tire off and on than install the product. I hooked up the truck to the trailer and before it stood at 39 inches and when hooked up it dropped to 37 1/2 from the floor to the wheel weld. Overall ride is comfortable with an empty truck load. Purchesed Sunday and was delivered by Wednesday. Great product



- TGMRCK15S
by:

Installed these on my 2016 Silverado. Gained almost 3/4 inch in suspension height back with a 26 foot travel trailer on the back. Much nicer ride as well. I’ll be getting them for the front when I get a plow. Very easy to install too.



- TGMRCK15S
by:
2014 GMC Sierra 1500

I installed this product to help level my 2014 GMC 1500/4x4 when towing a 18ft trailer. They work great and yes I would buy them again. However it will stiffing the ride of your vehicle with no load. If you do not use your truck a lot to carry or pull loads you may not like them. They work just as instructed by the company. Took me only 15 mins to install and a good looking product.



- TGMRCK15S
by:

These timbren springs completely stopped my truck from sagging when hauling heavier loads and have made for a much smoother ride. I highly recommend these.



- TGMRCK15S
by:
2013 Chevrolet Silverado

Install was straight forward; the old stops fought me a bit- a few shots of PB helped. Great install videos on your website to help me. Looking forward to towing my camper with the Timbren’s installed! I decreased 1 1/2” of rear end squat when I hooked onto my 7000 lb camper (before attaching my weight distribution bars.) Thanks!



- TGMRCK15S
by:
Chevrolet Silverado

Love these things, best thing I ever installed on my truck and supper easy to install. Particularly with the 2020 Chevy Silverado, the holes for the bump stops are threaded so all I needed was a little red lock tight and that was it holding great. I installed the 1/2" spacer along with the metal spacer that comes with it and it brought the Timbrens a lot closer to the axle (1/2") so there is less squat under load, which is what I wanted; however, it does cause a rougher ride if the tires go over anything more than a seems in the concrete. I could have bought these directly from Timbren, but you really can't beat e-trailer customer service.


37
3867
Show More Reviews

Ask the Experts about this Timbren Vehicle Suspension

  • Comparing Timbrens and SumoSprings for a 2019 Chevy Silverado 1500
    The main difference between the Timbren Rear Suspension Enhancement System part # TGMRCK15S and SumoSprings Solo Custom Helper Spring part # SS45FR for a 2019 Chevrolet Silverado 1500 is hardness. The Timbrens are much denser than the SumoSprings so although they will provide more support, they will also produce a rougher ride. I recommend the SumoSprings since it does not sound like you will be towing everyday and still need the truck to have a factory-like ride quality most of the time...
    view full answer...
  • What is Difference Between Timbren Suspension Kits # TGMRCK15S & TGMR15MR For 2020 GMC Sierra 1500
    There is a difference between the kits you mentioned. The part # TGMRCK15S is for the Denali models and the part # TGMR15MR is for the models that have adaptive ride control.
    view full answer...
  • Timbrens or Roadmaster Active Suspension for 2020 Chevy Silverado 1500
    So just to answer the first part of the question, since you don't have a lift on your 2020 Chevy Silverado 1500 you do not need a spacer to use the Timbren Rear Suspension Enhancement System # TGMRCK15S. As for comparing the Timbrens to the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611, the answer really depends on how much you tow or need suspension support for your Chevy. The Timbrens will do a great job for semi-regular towing or support, but if you are...
    view full answer...
  • Comparing Firestone and Timbren Jounce Style Suspension Enhancement TGMRCK15S vs F8610
    So the Timbren kits like the part # TGMRCK15S that you referenced are known to provide great suspension support but they are also known to be a bit harsh when unloaded. The Firestone Work-Rite kits like part # F8610 are much more comfortable than the Timbren kits but maybe they don't provide quite as much suspension support. I'd pick between the two based on what you prioritize. If you want the most support possible then Timbrens, if you want a slightly more comfortable ride with still...
    view full answer...
  • Does Timbren Kit for 2019 Chevy Silverado 1500 Trail Boss Require Spacers
    The factory lift of your 2019 Chevy Silverado 1500 Trail Boss would not require you to use additional spacers to fit a Timbren kit like the part # TGMRCK15S. The best suspension enhancement for your truck is the Roadmaster Active Suspension kit part # RAS4611 as it gives you the support you are wanting without making the ride quality harsher like the Timbrens can sometimes do and also improves the handling as an added bonus.
    view full answer...
  • Best Suspension Enhancement for 2020 Chevy Silverado 1500 for Squat When Towing
    Thanks for the photo and the Timbren Rear Suspension Enhancement System # TGMRCK15S you mentioned is a good option for helping keep your 2020 Chevy Silverado 1500 level, but the best option is something a little different, the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611. The reason why the RAS kit is the best is because it is an active system, which means it continually works to reinforce your Silverado's leaf spring suspension. The force normally put on...
    view full answer...
    Image 1 for
  • Recommended Rear Suspension Enhancement For 2021 GMC Sierra 1500 AT4
    The correct Timbren Rear Suspension Enhancement for your 2021 GMC Sierra 1500 AT4 is the Timbren Rear Suspension Enhancement System # TGMRCK15S you were looking at which has an 8600lb load rating, but I have a different option for you. I recommend going with the SumoSprings Solo Custom Helper Springs - Rear Axle # SS45FR which have a load rating of 1500lbs which is plenty for your 6500lb travel trailer since the only weight that gets put on the rear suspension of your truck is the tongue...
    view full answer...
  • Suspension Enhancement for Light Cargo Trailer and 2020 Chevy Silverado 1500
    I wasn't 100 percent clear on if you were asking about a suspension upgrade to your cargo trailer or 2020 Chevy Silverado 1500, so what I'll do is recommend a suspension upgrade for both, which is the Timbren Suspension Enhancement System. - For Trailer: Timbren Trailer Suspension Enhancement System Light-Duty Trailers # TTRA1702 - For 2020 Chevy Silverado 1500: Timbren Rear Suspension Enhancement System # TGMRCK15S The Timbrens are going to help both your trailer and truck with...
    view full answer...
  • Recommendation for Sag at Back of 2004 Chevy Silverado 1500 When Towing
    The first thing I recommend doing is checking out the max towing and payload weights for your 2004 Chevy Silverado. These can be found in the owner's manual and I do not recommend exceeding them as that can cause premature wear to your suspension as well as elsewhere on your truck (like the engine). For your application I recommend adding suspension enhancement. This won't increase the amount of weight that you can carry but it will help to improve your loaded ride quality and take out...
    view full answer...
    Image 1 for
  • Which 1" Spacer Is Compatible With Timbren TGMRCK15S On 2020 Chevrolet Silverado 1500 4WD?
    The Timbren Rear Suspension Enhancement System # TGMRCK15S you have installed on your 2020 Chevrolet Silverado 1500 4WD use an M10 bolt to secure it to the frame. The correct 1" spacer for this kit is the # TA25723-90AD00 which has a 1/2" diameter bushing. I included videos of the products mentioned for you to take a look at.
    view full answer...
  • Extra Suspension Support on my 2015 GMC Sierra Denali
    The SumoSprings Solo Custom Helper Springs part # SSR-209-40 will be a good fit for your 2015 Gmc SIerra 1500 4x4 with the magneride. They will only see pressure when the vehicle is loaded and won't interfere. At their initial contact point they are quite soft. I also like the way you worded it to say support. These systems won't add capacity to the truck just help it handle what it was designed to haul.
    view full answer...
  • Correct Timbren Rear Suspension Enhancement System for a 2021 GMC Sierra 1500 with AT4
    The correct Timbren Rear Suspension Enhancement System for a 2021 GMC Sierra 1500 with AT4 is part # TGMRCK15S. This is a complete kit that comes with everything you need and is a confirmed fit from the manufacturer for AT4 models.
    view full answer...
  • Difference Between Timbren And SuperSprings Suspension Stabilizer For 2016 Chevy Silverado 1500 4WD
    So the difference between the Timbren Rear Suspension Enhancement System # TGMRCK15S and SuperSprings Custom Suspension Stabilizer and Sway Control Kit # SSA28 are the benefits they offer and what you are looking to get out of an enhancement system. The Timbrens # TGMRCK15S are jounce springs and how they work is simple but effective. When you have additional weight at the rear of your truck, like when towing, it will sag, causing the front of the truck to rise. This causes your front...
    view full answer...
  • Extra Lift Support For 2019 GMC Sierra AT4
    I spoke with my contact at Timbren about your AT4 truck, which has a 2" lift from the factory and the correct kit for your truck is the Timbren # TGMRCK15S Rear Suspension Enhancement System You mentioned "extra lift" in your question title. I want to make sure that you understand that this will not lift an unloaded truck, but rather help it not to squat down in the back under a load. You also asked about spacers. When installed (in an unloaded truck) there should be about 1" of...
    view full answer...
  • Which Timbren Kit for 2020 Chevy Silverado 1500 Towing 5,900 lb Travel Trailer
    The lighter duty Timbren kit part # TGMRTT15S is the way to go for your 2020 Chevy Silverado 1500 towing a travel trailer that weighs 5,900 lbs. The heavier duty option is going to be much harsher in ride quality so I would not recommend it.
    view full answer...
  • Which Timbren Suspension Enhancement for 2019 Chevy Silverado 1500 LT
    Yes. The Timbren # TGMRCK15S are a confirmed fit on the 2019 Chevy Silverado 1500 LT. These Timbren springs provide an easy to install solution to help keep your truck level during towing and fight body roll. I've linked a short review and installation video of these for you to check out, as well.
    view full answer...
  • Timbren Rear Suspension Enhancement for a 1998 Chevy C/K Series 1500
    There are 2 different Timbren systems available for a 1998 Chevy C/K series 1500. If you have 4 wheel drive you will need # TGMRCK25. If you have 2 wheel drive you will need # TGMRC25HD. I have included links to the instructions for each and an FAQ on Timbren systems for you. The system you have referenced only goes back to 1999 models.
    view full answer...
  • Which Timbren Springs For 2019 Chevrolet Silverado 1500
    I recommend Timbren Rear Suspension Enhancement System part # TGMRCK15S for the 2019 Chevy Silverado 1500 2WD. These Timbrens are designed for pickups compared to the other options that are designed for service vehicles like ambulances. They provide a 8,500 lb capacity and will support the suspension to avoid rear sag. They are are a straight forward installation because they simply replace the bump stop compared to other options that require hours of installation time. I have attached...
    view full answer...
    Image 1 for
  • Can a Timbren Suspension Kit be Used with Weight Distribution System
    Yes, you can use a Timbren system like the part # TGMRCK15S with a weight distribution hitch on a 2017 Chevy Silverado 1500. If you have the WD system already you'll have to go through the setup process again after the Timbren install since you'd need less spring bar tension.
    view full answer...
  • Does Timbren Suspension Enhancement Fit 2019 GMC Sierra 1500 Denali
    Yes, the Timbrens # TGMRCK15S do fit your 2019 GMC Sierra 1500 Denali. I've linked a video showing the installation on a 2016. The install process is the same. These install with a single bolt replacing your factory bump stops.
    view full answer...
  • Recommended Rear Timbren Spring Clearance On A Lifted 2014 Chevrolet Silverado
    Per the manufacturer's recommendations, there should be approximately 1"-1.5" of clearance between the rear contact point and the Timbren Rear Suspension Enhancement part # TGMRCK15S when not under load. Too little space will cause the spring to constantly ride on the axle/bracket resulting in a bouncy uncomfortable ride where as, a spring to far from the contact point will not allow for the full capabilities of the spring to be exerted. Since you currently have 1"-1.5" of clearance,...
    view full answer...
    Image 1 for
  • How To Fix Rough Ride with Timbrens On 2017 Chevrolet Silverado 1500
    The Timbren Rear Suspension Enhancement System part # TGMRCK15S is a great option to help reduce sag while towing with a 2017 Chevrolet Silverado 1500 but they do have a tendency to ride rough as the material is very dense. I think the perfect option for a compromise between support and comfort are the SumoSprings Solo Custom Helper Springs part # SS95MR. These ride much smoother than Timbrens and still provide support for towing or hauling.
    view full answer...
  • Rear Suspension Enhancement for Rear Sag with Trailer on 2018 Chevy Silverado 1500
    To help reduce rear sag when hooked up to your camper the best option in terms of rear suspension enhancement is an air bag system. This will let you actually fill the bags up when needed to close up the gap between your bump stop and contact point with a heavy load. For your 2018 Chevy Silverado 1500 4x4 I specifically recommend the Firestone Ride-Rite # F2430. These air springs will provide you with up to 4,800 pounds of load-leveling support and their unique double-convoluted construction...
    view full answer...
  • Comparing the Timbrens and SumoSprings for a 2014 Chevy Silverado 1500
    I have two options for you to help with squatting while towing with your 2014 Chevrolet Silverado 1500. These two options are the Timbren Rear Suspension Enhancement System part # TGMRCK15S and the SumoSprings Solo Custom Helper Springs part # SSR-209-40. The main difference between the two is that the Timbrens are made of a much more dense rubber so they will provide more support but the adverse effect of this is that they could also decrease the loaded ride quality. The SumoSprings...
    view full answer...
  • How Many Lift Spacers are Needed for Timbren Springs on a Lifted 2013 Chevy Silverado 1500
    Finding the correct spacer(s) for a lifted truck can be a little tricky sometimes due to the number of lift kits out there. The best way to determine how many spacers you need for the Timbren Suspension Kit, # TGMRCK15S, for your 2013 Chevy Silverado 1500 is to measure the distance from the underside of your frame where your bump stop sits to the axle directly below where the spring makes contact. The spring and bracket in this kit measure 5 inches tall unloaded and the spring should...
    view full answer...
    Image 1 for
  • 5th Wheel Towing Capacity For A 2007 Chevy Silverado 1500
    The 9,048lbs is the dry weight but you still want to account for the weight of your cargo. Per the owners manual, you're limited to between 14,000 to 16,000 lbs as far as Gross Combined Weight Rating of the completely loaded vehicle and trailer including any passengers, cargo, equipment and conversions. If you load your truck as you intend on using it, you can have it weighed at a commercial scale location. The difference between this weight and the Gross Combined Weight Rating total...
    view full answer...
  • Rear Suspension Enhancement Recommendation for 2010 Chevy Silverado 1500 Z71 4WD Crew Cab
    The best suspension enhancement we offer for your 2010 Chevy Silverado 1500 is the Roadmaster Active Suspension Kit part # RAS54FR which will give you the support you are wanting for the trailer you plan to tow while improving loaded and unloaded ride quality as well as handling and stability. Other options, specifically Timbrens, are known to make the ride quality a bit harsher which is why I don't typically recommend them unless the vehicle will be loaded down nearly all of the time.
    view full answer...
  • Suspension Enhancement Recommendation for 2015 Chevy Silverado 1500 that Is Not an Air Bag
    We have great suspension enhancement options for your 2015 Chevy Silverado 1500 that will help support the rear suspension. The Timbren kit part # TGMRCK15S is a confirmed fit and is a jounce bumper style of kit instead of an air bag. This means you get all of the support without having to inflate air bags at any point.
    view full answer...
  • Recommended Timbren Suspension Enhancement for 2017 Chevy Silverado 1500 4x4
    For your 2017 Chevy Silverado 1500 4x4, I recommend the Timbren Rear Suspension Enhancement System # TGMRCK15S. The 8600 lb rating is for just the spring's ability and they will not be used to that extent on your vehicle as other parts would fail first. You won't have that much weight on your bumper or in your bed when towing the 12K max as the trailer axles will carry much of that load. These springs will compress more as more weight is added and will become more rigid as they compress....
    view full answer...
  • What is the Height of the Springs in Timbren Suspension Enhancement Kit # TGMRCK15S
    I went out to the warehouse and pulled Timbren kit # TGMRCK15S to take some measurements for you. The overall height of the spring is 5-1/8 inches and the overall width is 4 inches (diameter). Timbren does make some 1 inch spacers, # A25723-90AH00, that you could use if more height is needed. This may result in the need for longer bolts that you would need to obtain locally. Use grad 5 or better bolts.
    view full answer...

Do you have a question about this Vehicle Suspension?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality vehicle suspension for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • 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 Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Expert Research:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Lori W
Expert Research:
Lori W
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Zack K
Video Edited:
Zack K
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Andrew K
Video by:
Andrew K
Employee Jonathan Y
Video by:
Jonathan Y
Employee Nicholas E
Test Fit:
Nicholas E
Employee Robert C
Test Fit:
Robert C
Employee Cole B
Installed by:
Cole B
Employee Mary E
Updated by:
Mary E
Employee Wilson B
Updated by:
Wilson B
Employee Anna W
Updated by:
Anna W

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.