/
Timbren/
Jounce-Style Springs/
Standard Duty/
Rear Axle Suspension Enhancement/
Occasional Towing and HaulingItem # TGMRCK25D
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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.
Features:
Specs:
Whether you're hauling heavy loads in the cargo area or by pulling a trailer, you will often see the rear 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 truck's weight, as well. Because less weight is on the front axle, the front tires are making less contact with the road. Overall handling - traction, steering, and braking - is negatively affected. But the resistance from Timbren's Suspension Enhancement System works with your factory suspension to keep your vehicle level and improve your driving experience.
The Timbren system has a custom-fit 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 that you are used to.
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 the truck level.
Each hollow rubber spring works independently to support the driver's 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.
Because the vehicle handles better with the springs, less turbulence will be passed along to the trailer, and this helps to keep the trailer in line. Your driving comfort is further enhanced if the trailer does begin to sway (from a gust of wind or a passing semi), because the movement from the trailer is not transferred to the truck. This also works to make the sway subside more quickly.
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.
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.
Installation Details 
2014 - 2019 GMC Sierra 2500 2 Wheel Drive
2014 - 2019 Chevrolet Silverado 2500 2 Wheel Drive
1988 - 1999 Chevrolet C/K Series Pickup 2500
1988 - 1999 GMC C/K Series Pickup 2500
2011 - 2013 GMC Sierra 2500
2011 - 2013 Chevrolet Silverado 2500
2011 - 2013 GMC Sierra 3500 - Cab and Chassis
2011 - 2013 Chevrolet Silverado 3500 - Cab and Chassis
2011 - 2013 GMC Sierra 3500 - Pickup
2011 - 2013 Chevrolet Silverado 3500 - Pickup
2014 - 2019 GMC Sierra 2500 4 Wheel Drive
2014 - 2019 Chevrolet Silverado 2500 4 Wheel Drive
2014 - 2019 GMC Sierra 3500 Cab and Chassis - 2 Wheel Drive
2014 - 2019 Chevrolet Silverado 3500 Cab and Chassis - 2 Wheel Drive
2014 - 2019 GMC Sierra 3500 Cab and Chassis - 4 Wheel Drive
2014 - 2019 Chevrolet Silverado 3500 Cab and Chassis - 4 Wheel Drive
2014 - 2019 GMC Sierra 3500 Pickup - 2 Wheel Drive
2014 - 2019 Chevrolet Silverado 3500 Pickup - 2 Wheel Drive
2014 - 2019 GMC Sierra 3500 Pickup - 4 Wheel Drive
2014 - 2019 Chevrolet Silverado 3500 Pickup - 4 Wheel Drive
Video of Timbren Rear Suspension Enhancement System
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Speaker 1: Today we're going to be taking a look at the Timbren line of suspension enhancement systems. Any time that we add weight to our vehicle, it's going to put a lot of strain and stress on the suspension, especially if we're towing a heavy camper, trailer, or we have a heavy load in the back.Tends to have the back end squat down, which again, it's going to put that strain and stress on the rear suspension because not only are we asking it to hold up the weight of the vehicle, but everything else that we add on to it. Which that can arise a lot of different issues. The front end is going to be getting pulled off, which will misalign our headlights, and our tires won't have as much contact, so our steering and braking is going to be diminished.But tat;s where timbrens are going to come into play. They're going to provide us that extra support so that when we do have those heavy loads, the back end doesn't sag down quite as much, and it's not putting so much stress on the back end. By doing that, the front end's not going to rise up, which means our headlights will be in line and our tires will have the correct amount of contact and pressure, so our braking and steering isn't affected.
And they're going to do that all while making our ride more comfortable with that extra load.Our timbrens are going to provide us the support we need by replacing our factory jump stops and mounting in between the frame and the axle. Now, yours may look different, so you want to double check inaudible 00:01:20 fit guide for your specific application.Now, each one of our timbrens is going to feature a steel bracket. They're all going to have black, powder coat finish on them to resist that rust and corrosion or any other kind of chemicals that may be on the road. They're going to have a hollow, rubber ayon 00:01:36 spring that's going to take a lot of that pressure and strain off of the rear suspension.Whenever we do load our vehicle down, the space between our frame and our axle is going to get smaller. That's where our spring is going to make contact with the axle, and it's going to start compressing.
Now, they are progressively rated, so if we have a small load or a light load, it's going to have a little soft engagement. But the further it gets compressed, the harder and stiffer it becomes, giving us the support we need with those heavy loads.And since they are rubber, they're going to have a lot of give to them, which means they're going to give us the support we need. But at the same time, they're going to give us some more cushion and absorb some of the road shock as we drive. And since the rear ones here aren't in constant contact with our aXle, it is going to provide us the same ride quality when it's unloaded.Our timbrens are going to work independently from each other from side to side. That way, if we have an off center load, it will help compensate for that, but at the same time, if we take an evasive maneuver or a really sharp turn, this is going to help reduce that body roll and some of that sway feeling that we get going on when we have a lot of added weight.Our timbrens for the rear are going to be a good enhancement for any time you're going to be adding weight to the back of your vehicle, whether it be a heavy trailer, a large load in the back or any other situation where you're adding a lot of weight to the back of your vehicle.Now, timbrens on the front are going to be a little bit different.
They're going to provide us that load-leveling support and make sure the front end doesn't get pushed down too far. However, these typically are going to be in contact all the time, which means it's going to give us that support and help reduce on that body roll all the time, all while absorbing that road shock, giving us a smoother ride.Now, some situations where you'd want that extra support on the front of the vehicle to keep it from getting pushed down too much would be if you have a snow plow or winch, if you flat-tow your vehicle, or if you have any other heavy accessory on the front. This is going to make sure that front end stays where it should be, and again, making sure our tires, braking and steering acts how they should.When comparing the timbrens to other suspension enhancement options like airbags, these are going to be a lot easier to install because we're not going to have to worry about running lines, maintaining air pressure, putting in switches or compressors or any of that. Once these are installed, these are going to be completely maintenance free. However, airbags are going to provide us with a lot more adjustability, whereas our timbrens are not going to have that.That'll finish up your look at the timbrens suspension enhancement systems..
Average Customer Rating: 4.7 out of 5 stars (1902 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.
Truck still sags is better but not good. Had air bags in the past much better. 699884
After a 3000 mile trip with a 42' fifth wheel on a 2016 Chevrolet single rear wheel short bed 3500HD, I will say they made a difference. They took some of the bounce and the side to side rocking out of the truck. I would definitely put them on my next truck as well. 667565
I purchased a used pickup without any jounce bumpers. I ordered these to provide more support rather than going back with stock ones. I pull a 5th wheel and these keep the truck level with less bouncing around and bottoming out when towing. When I'm not towing they sit about an inch or inch and a half about the stops so they do not negatively impact the ride quality. They work as advertised and I'm pleased with them. 653123
Leaving for Pizmo this weekend but it seems like they would just be the ticket. 3500 Denali, 43 foot toy hauler looks like it’ll fix my sag problem just right 543509
this is the second set of Timbren springs I have purchased, the first set was on my Ford Raptor, they took all of the sag and sway out of pulling my boat. I have this set on my 2015 GMC Denali 2500HD, I pull a 42 ft. 5th wheel and the Timbren's take all of the sag and sway out, these are in my opinion the best product I have purchased for my truck. 683687
best thing i bought for pulling my fifth wheel camper. camper handle great while driving and no more bucking up and down in my truck. i believe they are better than airbags 655605
Second time I've ordered from Etrailer. Super happy AGAIN! Install wasn't bad. Went in tight. (Like they should???? ride is awesome. Truck holds strong at 3/4" lower with load. I love it. Package wasn't in sealed and box was busted up. But, rubber. So who cares???? 651388
I INSTALLED THE TIMBRENS ON 7-5-12 AS PER PREVIOUS REVIEW. I TRIED THEM TODAY PULLING MY 35 FT. 5TH WHEEL.THESE THINGS ARE WORTH EVERY PENNY,VAST IMPROVMENT. THE TRUCK HANDLES BETTER,SITS BETTER,RIDES BETTER UNDER LOAD. GOOD JOB ,ETRAILER 50638
Haven't towed the 5th wheel trailer yet, but installation was fairly easy. So far, the ride unloaded hasn't changed, but I'm sure it will be great with the trailer. These are serious parts and appear to high quality. 124219
After having towed our fifth wheel trailer over 15,000 miles with the Timbrens, I can say they are great. The truck stays level and the trailer tows great. This is much better than having to mess with air bags.
Bob R - 04/07/2015Very happy with my timbrens and quick shipping. Added these to a 2013 2500HD 4X4. Quick and simple to install. improved ride quality and takes the squat out when pulling a gooseneck trailer. Very happy and would recommend to anyone wanting to improve quality of ride height. 493187
We have installed this product on all of our 3/4 and 1 ton trucks since 2005. works great, this product is super easy to install. improves payload and trailer control. 142677
we had one of the trucks tear off the timbren on some very rugged terrain, rutted and washed out roads, I contacted timbren, they sent a replacement free of charge, great product and support. the installation on 2014 and newer Silverado 2500s could not be easier, pop out the old bumper stop and press in the new
Todd M - 07/23/2015I really like them a lot. I pull a heavy fifth wheel on a 3/4 ton truck. I'm right at the payload limit and thes seem to keep the truck level. The ride is great loaded or unloaded. I recommend them over air bags in my case. 409480
Excellent I took them off my 3/4 ton and put them on my 1 ton as they were the same stock . I dont think I installed them properly as one came off. I called Timbren and explained what happened and they sent me a new pair. Awesome customer service from Timbren.
Jim - 07/23/2018I had bought these timbrens and the weight safe hitch with the 8” drop from etrailer. I was quite please by both products. Installation of the timbrens was very easy, only took 30-40 minutes to change out bump stops in my garage.I hauled a Uhaul trailer with a Jeep over 300 miles, with no issues. The timbrens worked great, no issues with the rife. And I really like the weight safe hitch. I recommend checking out these two products from etrailer. Thanks etrailer. 642864
This is the second set of Timbrens that I have purchased from etrailer and as always they work perfectly with my trailer and Bulldog ATV rack. The shipping is fast, prices are very good, and customer service is great. 288547
I really appreciate your service, it is excellent. Everything I have ordered, tires and rear lift kit were very good quality. I will order again! 395100
Excellent product. Installation took 20 minutes or less and was very simple. 673880
I bought Timbrens to install on my 2015 Silverado 2500HD truck, which I use to haul our 5th wheel. I had a set of airbags on my old GMC and they worked well, however, they were a concern when it came to maintenance. I saw a review and recommendation for Timbrens and thought they were a great alternative to having airbags installed. I read the instructions and can see no problems with installing them myself - thereby not only saving in the cost over the airbags, but also not having to pay anyone to install the Timbrens. Everything I have read about them makes me feel very good. I don't see the truck lowering with the 5th wheel attached, but having the Timbrens installed will take away any worries with rough roads. 613453
Easy to install, great product !! 304779
Great product, easy to install with NO tools! Just remove the old bump stops and push and twist the Timbren into the socket. Compared to helper springs or replacing leaf springs taking hours, this installation can be done in minutes. Not only does the truck carry a load more level, it helps greatly in towing trailers by eliminating some of the suspension roll and bouncing. All of our 3/4-1 ton trucks have these installed, we have only had one issue with a severely overloaded 2010 truck driving off road and broke one off, Timbren customer service replaced it for free! 306739
I just purchased a 2018 Chevrolet 3500 drw to replace my 2015 truck that was identical. I had air bags in my previous truck but decided to give the Timbren rear enhancement system a try. I watched the video about them as well as the install and decided that for the price as well as the ease of installation that I would give them a try. my only reason for using anything on the rear suspension is to eliminate the added "squat" that these trucks are known for. Ordering was simple, I called with a question and spoke to Angela, not only did she cheerfully answer my question, but also offered to place the order for me. I took her up on the offer and after completing the call I had an order confirmation email, and within 30 minutes I had a shipment confirmation email. I have ordered from Etrailer a few times and I must say that they are one of a few companies that I never worry about having a bad experience, they are always on top of their game. I received the product within 5 days using the free shipping. I installed them on Saturday, and to my surprise it was as easy as the video shows, within 20 minutes I had both sides installed and was cleaned up and hooking to the trailer. I was thrilled when I hooked up and checked the level on my trailer to find out that I was sitting exactly at the height that I did with 50#'s of air in the airbags on my other truck. I jump in and take a run around the block, making sure I hit a railroad crossing and I will say I am very pleased. Great job Timbren, Angela and Etrailer !! 499444
A really good product. Installed easily. Highly recommend you restake them so they are less apt to vibrate off. They easily carry my 2600 lb camper and remove most of the weight from the overload springs. They also assist greatly in preventing side to side swaying and help to keep the camper upright while cornering. 528107
15 minutes to install. That includes time for jacking up the vehicle to get more room to work (not required) No tools required for removal and installation. Followed included instructions. Helps keep truck level under heavy load. Works great on my 2018 Sierra 2500 HD. Would recommend. etrailer great place to due business. I am a return customer. 564232
This rating of 4 stars is because I have not put a load on my truck to test the drive loaded. I have driven it unloaded. The unloaded ride is the same as original. Installation was easy, I looked at the etailer video perfect procedure. It took 30 minutes tops. Fit perfect, easy installation, speedy delivery. 445995
I did 8,400 miles summer with a 3900 lbs dry weight truck/camper on the truck. The Springs preformed as good as I hoped they would. I definitely would recommend them for this application.
Richard - 10/25/2018The only reason I gave a 4 star to suspension product is because they are a bit over needed support. I haul a truck camper and it weights around 2800 lbs. when loaded. My suspension only drops a couple inches. The ride is a little stiff, but I feel safe with very little sway. Weight transfer goes forward so steering is the sway. it would seem a shorter product would work better. A inch doesn't much but it might work better. 523348
I bought these for a 2012 GMC 2500 Duramax. The installation for these was much easier than I anticipated (I can't say the same for the front suspension system.) Just lift up your truck, pry out the stock bumper stops, line up the Timbren springs with a 2x4 underneath, and lower the truck. The weight of the bed/frame is enough to get the Timbren spring to seat correctly. This took me less than 10 minutes. Ride quality seems to have improved as big bumps on the road are less rough. These keep the truck from sagging underneath the weight from a trailer, too, though I didn't have much problem with that to begin. Overall, I like this addition. Easy. 48427
Fast shipping and exactly what I wanted. Works great pulling a camper. Took the wiggle out of rear end on highway when changing lanes. Anyone with a camper should try these. Also helps when an 18 wheeler passes with the pull, to me anyway. Anyone with a camper of any size knows what I mean. 150670
Performs as advertised. We pull a 5th. wheel travel trailer. Very little bed drop. Applicable to a 2015 GMC 2500. Had a problem finding a shop to install. So, installed my self which was rather simple and easy. Took about 30-45 minutes. Could do it in 20 minutes now. Tools you should have ready. Large screw driver, 2, 6 inch or so length of 2x4, hydraulic jack to lift truck bed. Pry the old pieces out, place both units in position, lift bed enough to put 2x4 beneath. Drop bed and compression will fit into place. Lift bed, remove 2x4, drop bed, You are done. 562908
Great product I used on my 2500hd GMC and now on 3500hd 407205
I installed them on my truck yesterday. Very simple to put in. Won't be able to see how well they work until I hook up our 5th wheel next for a trip. 576508
thanks for the email back and this was the easiest job I have ever done. 8 minutes and I was done. will send pictures 115200
These beauties are GREAT! I have had air bags before which most know the issues with them. These make my truck stay level and even helped with the bouncing of the rear better then air bags. I would recommend them to those who don't want to mess with air bags and they will last longer. Very easy to install. Took me less than 15 minutes to do both sides. 362615
When I purchased these stops I had in mind that they would help with loads on my 2500HD. I towed a Trailer at 6800lbs. With the stops it help with load droop and ride stability. Now I have a 10,000lbs fifth wheel and the stops have preformed with wonderful results. Im very glad I when this way for load assist. I do recommend this product.
Robert M - 04/04/2018Fast delivery and easy installation on my 2017 GMC 2500. At a glance it didn’t appear that I needed any support however, they level and stabilize my 2400 lb truck camper with the added weight of water and tounge weight from my boat trailer, It also handles better in wind. I like Timbrens better than air bags as there is no air to leak or install. I had timbrens on 2 other trucks and liked them also. 505476
Installing this product is very simple a floor jack does help to get them seated. Have not had a chance to pull my 40' fifth wheel yet but I do have a friend that has had these for awhile and he told me that they are awesome. 312221
Easy Installation and great quality bump stops. ride quality definitely improves when loaded sway control is noticeably improved as well. 730165
Excellent product and even better service. Highly recommended. I literally called on a contract job and while on the phone they processed exactly what I needed. Install was even easier. A Plus. Repeat customer again and again. Only gets better! 728750
Haven't towed with them yet, but installation was simple and quick even for this 66 year old man. etrailer's customer service is second to none. 727392
Will never go back to air bags. No messing with them. Ride better loaded. And dont notice them unloaded. Caused no problems with my moryde pinbox . Took about 3 minutes to install 726476
bottomed out when hauling a rv trailer, had to go with air bags for better support and ride 722709
I purchased these for my GMC 2500HD diesel pickup to beef up the sag when pulling my 5th wheel camper. They were a little difficult to install only because all I had was a floor jack. But I did eventually get them in and they work well. I would advise them for anyone pulling a heavy load. 721555
These are one of the best products ever! Simple, effective and a reasonable price. They are carefree, invisible when unloaded and very easy to install yourself. I tow a 37ft 12,500lb 5th wheel with my 2018 2500HD. Though my truck already handled the load well, these make the ride more stable and controlled. Lifts the rear up about 1.5 inches as well as keeps things centered from left to right. What's most important when towing is keeping the steer axle on the road. Though I recommend them for any towing configuration; for those of you that push the limits, these are a must have. Brilliant product! Thanks Timbren for the magic bullet! 708124
Great product. Easy installation 700034
installed as instructions stated piece of cake to install 692507
Excellent product. 690592
prompt delivery, product works very wel l. 690119
Just put these on my 2015 duramax, hooked up to the camper and off I went. Great product, easy installation. Would always recommend these, great alternative to the airbags. 683459
I purchased a set these for my 2015 Silverado HD and they worked great. Now I installed them on my new 2019 Silverado HD. Great product. 673861
These are literally maintenance free, just install in a few minutes and never worry about them. Although, unloaded and going over a big bump you do feel them hit (b/c at this point they are just a longer jounce bumper). I'm considering moving to air bags, but for now, these work really well on my 2016 GMC Sierra 2500HD 6.0L SLT Crew 6.0L pulling a 40' KZ Sportsmen 10k 5th wheel. 654761
Great product. Keeps the truck level when towing my fifth wheel. When not towing, your truck rides normal. Very easy to install. 648010
What an amazing product! Installed in less than 20 minutes. There is no change in ride quality with the truck empty. When towing my 16,000 lb trailer the truck handles much better and doesn’t sag. 643644
The product does as expected. I am very happy with the performance. 635752
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