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  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

Item # TGMRCK15S
Our Price: $252.45
You Save: $44.55
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8,600-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use. Great Prices for the best vehicle suspension from Timbren. Timbren Rear Suspension Enhancement System part number TGMRCK15S can be ordered online at or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TGMRCK15S

  • 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.


  • 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
  • Includes 2 Aeon hollow rubber springs, vehicle-specific brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required


  • Capacity: 8,600 lbs
    • Do not exceed 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

Installation Details TGMRCK15S Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Timbren Rear Suspension Enhancement System - TGMRCK15S

Average Customer Rating:  4.7 out of 5 stars   (4784 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.


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!

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


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
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.

Awesome for hauling four wheeler in bed and for hauling load of fire wood in the bed, no broken leaf springs and no sag
Joe - 03/23/2022

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

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

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.


It's okay. I believe I'm going to replace it with an air bag system though, as currently every time I hit a bump the springs make the small gap to the top of these and I'm always hitting the bump stops.

You mentioned that when hitting a bump a gap appears above the springs. Would be able to send a picture?
-- Etrailer Expert Jenny N - 05/09/2022
There is always a gap above the springs, they do not contact the leaf spring while the truck is resting. It is just small enough of a gap that any bump I do hit makes the leaf spring contact the Timbren jounce spring, which has the same sound effect as hitting a bump stop.
-- comment by: Christopher - 05/09/2022
My apologies as I was thinking that you meant that there was a gap at the top of the Timbren bump stop verses at the bottom between the bump stop and the springs. Of course, there should be a 0.5 inch to 1.5 inch gap and some people feel like it creates a stiffer ride when the truck is not loaded. I think this is what you are experiencing. I would recommend taking a look at part # AL89388
Air Lift LoadLifter 5000 Ultimate Plus Air Springs w/ Internal Bumpers - Stainless Steel - Rear Axle
for your 2021 GMC Sierra 1500 with 4 WD. There are a few tech tips to consider with this kit. It will not fit with vehicles equipped with Adaptive Ride Control or the AT4 models.
-- Etrailer Expert Jenny N - 05/09/2022


Much bouncier ride than anticipated after installation. I followed etrailer’s recommendation in choosing them but I’m wondering if air shocks would not have provided a more acceptable ride.


They did there job to help level out the truck when hauling however the ride was rougher than I preferred so I opted for airbags instead.

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.

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.

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.

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.

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.


I have a 2018 Sierra and these Timbren are terrible. They are way too hard and when you hit a bump they slam hard on the axle. I plan to put my originals back on.

We offer a similar product that might work better for you. The SumoSprings # SS45MR
SumoSprings Solo Custom Helper Springs - Rear Axle
is made of a softer material that will provide a ride thats less harsh than what you would get with the Timbren product.
-- Etrailer Expert Mike L - 09/15/2022


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.


I actually found that airbags worked better for my truck and trailer. I ordered those from you as well. May I return the Timbrens for at least partial store credit?

I will have our Customer Service team reach out to you.
-- Etrailer Expert Jenny N - 06/02/2022

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


The supplied bolts are too short. Finding the right bolts added to time to do the install.

The jounce springs are 1/2 inch from axle. I'm sure the ride will be very harsh even when not loaded...


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.

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

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.


Good customer service poor shipping box came open

I will have our Customer Service team reach out to you.
-- Etrailer Expert Jenny N - 04/21/2022

2021 GMC Sierra 1500

Good quality and I liked the installation videos.

2017 GMC Sierra

Installed on my 2017 GMC Sierra 1500 for towing my camper. It’s a bit bouncy but definitely gives me more lateral and controlled ride with my 5300ish lbs camper. I installed myself and was fairly easy. Overall satisfied with the product.


I think that they are awful. I was told that I couldn’t return them. Upon me purchasing them you did not have the item I was specifically looking for and I spoke to one of your salesman who recommended these and said they were the same thing. Which they are absolutely not. So I would say I am totally displeased not necessarily for the product but for the lack of knowledge from the salesman don’t really know if the product is in good working condition because it’s not the product I was looking for. So now I’m stuck with something I can’t use.

Thank you for your review! I am sorry to hear that this suspension enhancement system is not a confirmed fit for your vehicle. I have sent your information over to our customer service department for them to better assist you.
-- Etrailer Expert Katrina B - 08/25/2022


I purchased these about a year ago and installed on my 2005 Silverado 1500 2wd. I have pulled many trailers with these and they really help the truck not sag so much. The worst part is if you partially load it just right, each bump you hit is HARD since the axle smacks up against these instead of compressing them.


I put these on a Z71 1/2 ton truck. I found a gooseneck horse trailer
with living qaurters 33' long total and when the dealer hooked it to my in bed hitch the truck dropped about six inches told too much trailer for my truck they suggested air bags never heard of timbren
I installed the timbrens went back to dealer this time test pulled you
would think its a 3/4 ton truck now only 3" sag bought trailer pulled it home thanks timbren! great product saved me from bying a different truck dealer thinks it will start selling these!

Thanks for the info Kevin. I just purchased a 3 horse slant gooseneck and my Ford F150 squats a bit. Think these will solve my issue. Thanks for helping me make up my mind!!
-- comment by: Mike B - 08/07/2014
How does your truck ride without A load?
-- comment by: Manny - 12/06/2015

Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Timbren Suspension Kit Recommendation for 2017 GMC 1500 Denali with MagneRide
    We have just what you need for suspension enhancement that fits your 2017 GMC Sierra 1500 with the MagneRide suspension. You'd want the part # TGMRCK15MR which is specifically designed for the MagneRide trucks. The part # TGMRCK15S you mentioned is not the kit you'd need. And air bag kits can't be used with the MagneRide.
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  • What Are The Differences Between The Timbren TGMRCK15S And TGMR15MR For A 2021 GMC Sierra 1500
    These two Timbren rear suspension systems are the same except for two major differences. They are both compatible with your 2021 GMC Sierra 1500. They are each rated at 8,600 lbs and are rated extra heavy duty. The differences are the Timbren Rear Suspension Enhancement System, part # TGMRCK15S, is jounce-style spring that replace axle bump stops on your frame and it does NOT fit vehicle's with equipped with Adaptive Ride Control. While the Timbren Suspension Enhancement System - Rear Axle,...
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  • Timbrens For 2017 GMC Sierra
    That's a really good question. I got a hold of my contact at Timbren, unfortunately they told me that each kit is designed to work specifically for that truck. So if your Sierra does not have magneride, you will want to use # TGMRCK15S, and if you do have magneride use part # TGMRCK15MR. Each kit is compatible with both 2WD and 4WD. While the spring may bolt up and thread on, each kit has different shaped springs, heights, and designed to work with the truck's factory suspension. So it...
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  • Correct Timbren SES Fit for a 2016 GMC Sierra 1500 SLT
    The Timbren Suspension Enhancement System (SES) # TGMRCK15MR fits a 2016 GMC Sierra 1500 if it has the MagneRide suspension. From what I could tell it looks like the MagneRide suspension typically only comes on the Denali for this year so since you have an SLT you need the Timbren SES # TGMRCK15S instead. I have attached an installation video of this kit on a 2016 GMC Sierra 1500 that you can check out. I'm glad our tech tip section was able to help you out in determining fit. There are...
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  • Best Timbren Suspension Enhancement For 2017 Chevy Silverado 1500
    The Timbren # TGMRTT15S is for service vehicles such as tow trucks; they are very stiff and for a standard 2017 Chevy Silverado 1500 truck that is for towing, you definitely don't want to use those. The best Timbrens for your '17 Silverado 1500 will depend on if you have the MagneRide suspension or not: - WITHOUT MagneRide: Timbren Suspension Enhancement System # TGMRCK15S - WITH MagneRide: Timbren Suspension Enhancement System # TGMRCK15MR I do recommend Timbrens for towing, as they'll...
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  • Does the Timbren Suspension System # TGMRCK15S fit a 2006 GMC Sierra Extended Cab Short Bed?
    Yes, the Timbren Rear Suspension System part # TGMRCK15S that you referenced will work on your 2006 GMC Sierra 1500 extended cab short bed. I confirmed this with Timbren. I also attached an installation video for this product on a very similar Silverado and installation instructions.
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  • Recommendations to Eliminate Sag on 2007 Chevy Silverado Towing 16-Foot Trailer
    The Timbren Suspension Enhancement Systems (SES) would be a solution for the sag you are noticing. Our customers towing larger trailers with consistent payloads on a full-sized pick-up see a lot of benefit with these kits. The Timbren Suspension Enhancement Systems # TGMRCK15S that you reference is a confirmed fit for a 2007 Chevy Silverado Classic and New Body 1500 Series. To determine if it is a fit for your particular vehicle style, I have included a link to our list of suspension enhancement...
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  • Will Timbren Rear-Axle Vehicle Suspension Kit # TGMRCK15S Fit 2014 Chevrolet Silverado 1500
    The Timbren Rear-Axle Vehicle Suspension Kit # TGMRCK15S that you referenced is a confirmed fit for the 2014 Chevrolet Silverado 1500 2-wheel-drive version as long as it is not the XFE. These rubber jounce springs install in place of your factory bump stops - without drilling - and provide progressive load support. When your truck bed is empty they will not affect the ride quality, but when it is carrying a load the springs will engage and provide more (progressive) resistance as the load...
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  • Timbren Helper Spring Option for 2014 Chevrolet Silverado 1500 Thats Been Lowered by 2 Inches
    When installed on a vehicle with a standard, unaltered suspension, the bottom of the Timbren Aeon spring will sit about 1/2 to 1-1/2 inches above the axle when the vehicle is unloaded. Because your vehicle has been lowered by two inches, the bottom of the springs will always be in contact with the axle. Timbren tells me that this will work, but you'll experience a rather poor ride. If you can provide me with the current distance between the top of the axle and the underside of the frame...
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  • Timbren Helper Springs for a 2003 Chevy Silverado 1500 Light Duty
    Timbren helper springs # TGMRCK15S will fit your 2003 Chevy Silverado 1500 light duty. The videos are trucks our customers brought us for the installation. We haven't had someone bring in a 2003 for this product so there isn't a video. But installation on your 2003 will be nearly identical to the 2005 which I have linked for you.
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  • Installation Of Timbren Rear Enhancement System On 2005 Chevrolet Silverado
    I have attached a link to the installation video for the Timbren Rear Suspension Enhancement System, part # TGMRCK15S on a 2005 Silverado as you requested. The installation instructions are also available on the product page. As the instructions and the video show, it is pretty easy to install the Timbren system. You just remove the bump stops you have on your truck first. Then assemble the Timbren system as shown in the diagrams in the instructions. You then use the existing holes and...
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  • Tips for Reducing Sway When Towing Ice Castle Fish House RV Trailer
    I looked up pictures of the coupler setup of your trailer and it would not be compatible with a weight distribution system since it basically uses a pole tongue and has a pipe that runs on top of the pole tongue as well. What you can do to fight sway is make sure that you have the trailer setting as level as possible when you are towing. (See help article on how to pick out the correct ball mount to allow this). Most sway is due to not having enough tongue weight relative to the total...
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  • Compatibility of Timbren Suspension Enhancement TGMRCK15S with 2000 GMC Sierra 1500 2WD 3-Door Cab
    I have spoken with one of our contacts at Timbren, who has confirmed that the Rear Suspension Enhancement System you referenced, part # TGMRCK15S will fit your 2000 GMC Sierra 2WD 1500 Series 3-door. To view the installation instructions, click on the provided link.
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  • Availability of Timbren Rear Suspension System For 2011 Chevrolet Silverado 1500 4WD
    The Timbren Rear Suspension Enhancement System, part # TGMRCK15S, is for the rear of your 2011 Chevrolet Silverado 1500 4WD. I am including a link to the installation instructions for you
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  • Timbren Rear Suspension System Used in Place of an Anti-Sway Bar on a 2009 Chevrolet Silverado 5.3L
    The Timbren Rear Suspension Enhancement System, # TGMRCK15S, will help stabilize the vehicle, absorb shock and help keep the vehicle level when pulling your 25 ft toy hauler, but should not be used to replace an anti-sway bar on your 2009 Chevrolet Silverado 5.3L. The Timbren suspension enhancement system is designed to work with your vehicles current suspension system and should not be used to replace any component of your suspension system other than bump stops.
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  • Do Timbren Suspension Enhancement Systems Have a Warranty?
    The Timbren Rear Suspension Enhancement System # TGMRCK15S you referenced do come with a limited lifetime warranty. I have linked for you separately their page which details the warranty. The # TGMRCK15S are a confirmed fit for a 2000 Chevy Silverado 1500; I've added a link to a video review and install of these springs for you to take a look at.
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  • 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.
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  • Can Weight Distribution be Used with Suspension Enhancement on 2017 Chevy Silverado 1500
    With the use of suspension enhancement like the # TGMRCK15S and weight distribution the trick is to install the suspension enhancement kit first and then go through the weight distribution system setup process after so that you get the correct amount of spring bar tension per the new suspension setup.
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  • Timbren Suspension Enhancement Recommendation on 2014 GMC Sierra 1500
    Suspension enhancement for your 2014 GMC Sierra 1500 is a good idea and will provide a more level and comfortable ride when towing your new travel trailer. According to Timbren, the Rear Suspension Kit part # TGMRCK15S-M2 mentioned in your question is a special kit designed more for lowed trucks. I recommend the 6,000lb Timbren # TGMRCK15S system as this is a confirmed fit for your vehicle and will give you plenty of room to work with at the listed weight capacity. I have included a...
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  • What Stops Porpoising on Tow Vehicle that is Using Weight Distribution with Trailer
    Most of the time when a tow setup is porpoising with a weight distribution system all you have to do is add a bit more spring bar tension to minimize the porpoising. With an Equalizer system you would need to angle the spring bars down further to add the additional tension. Suspension enhancement like the Timbren part # TGMRCK15S would help but you should be able to solve the problem with the WD system.
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  • Height and Width of the Timbren Rear Suspension Enhancement System 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).
    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 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, I...
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  • Suspension Enhancement Recommendation for 2016 Chevy Silverado 1500 with Curt 5th Wheel Rails
    I have a suspension enhancement solution for your 2016 Chevy Silverado 1500 but none of the air bag kits are a confirmed fit. What will work great instead is a Timbren kit part # TGMRCK15S which is a confirmed fit for your vehicle and due to the way it installs does not interfere with fifth wheel install rails.
    view full answer...

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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 Kevin C
Test Fit:
Kevin 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
Employee Carrie F
Updated by:
Carrie F

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