/
Timbren/
Jounce-Style Springs/
Standard Duty/
Rear Axle Suspension Enhancement/
Occasional Towing and HaulingItem # TGMRCK15S
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Our Price: $214.67
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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 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.
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.
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.
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.
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.
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'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 - 2018 GMC Sierra 1500
2019 - 2019 GMC Sierra 1500 Limited
2014 - 2018 Chevrolet Silverado 1500
2019 - 2019 Chevrolet Silverado 1500 LD
1999 - 2013 GMC Sierra 1500
2007 - 2007 GMC Sierra New Body 1500
1999 - 2013 Chevrolet Silverado 1500
2007 - 2007 Chevrolet Silverado New Body 1500
2001 - 2006 GMC Sierra 1500 LD
2007 - 2007 GMC Sierra Classic 1500 LD
2001 - 2006 Chevrolet Silverado 1500 LD
2007 - 2007 Chevrolet Silverado Classic 1500 LD
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 (1703 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.Great product, quick install. Fast delivery! Very pleased with product. Installed on 2007 Chevy Silverado 1500(new body style). Used Firestone air bags on last truck and always had to add air. timbrens are ready for work everyday without maintenance. 178862
very good product ,took the truck out to test timbren rear suspension,the trucks ride was not changed buy them with out a load. easy to install them, took a very short time to put on. have not had chance to hook the trailer up but i would say they will do the job well 180726
Ordered by telephone around 10:30 AM, product was delivered via UPS around 1:30 PM the next day. I had them installed that evening after getting home. I hooked up my travel trailer to my truck, everything leveled out, no sag. Can't wait to see how they do on the road pulling my trailer. 65385
The suspension enhancement works as I wanted it to perform. I am well pleased with it. I tell others about it when we talk travel trailers and pulling. My wife says it rides like a truck. My reply is and!
-- comment by: Marcus - 02/12/2014Installed these Timbren bump stops on my 2015 GMC Sierra 1500 and couldn't be happier! You must follow install directions exactly, meaning you must take all weight off the rear axle. I blocked the front wheels and then used my floor jack at the rear hitch to lift the rear off the ground. Once this is done you have the clearance needed to get tools in for the removal of the old and replacement of the new ones. Watch the short install video and you'll have all the info you need to accomplish this. Old GM bump stops look like "toys" compared to these. Great purchase. 277397
Great product theses are my second set put them on my 2011 Chevy 1500 just put a set on my 2018 1500 they work great I have a fifth wheel camper 568503
FAST DELIVERY! Installed in 25 minutes. Fit was perfect. Reduced squat by 2 inches on 6000lb trailer without the WD bars attached. Should be even better with bars on. 2013 Chevy 1500. 102891
How is the ride in the truck with no load?
-- comment by: Lance S - 05/21/2014Caveat: I just installed these and have only road-tested unloaded. 1. As usual, etrailer filled my order quickly and accurately. 2. Installation was as easy as advertised. I did not have use of a lift and did it in my driveway. I did not remove the tires. I lifted one side at a time, blocked all other wheels and used a jack stand to back up my bottle jack. Hint #1: the higher you lift the truck, the more clearance you will have to work over the tire and insert your socket into the jounce stop and Aeron spring. Hint#2: The hole in the bottom of the factory jounce stop is small. Use a 3/8" drive 10mm socket. My 1/2" 10mm socket wouldn't go in the hole. 3. Installed, I ended up with a little more than 3/4" clearance. My road-test showed me that the Timbren SES has NO influence on unloaded ride unless you drive like an eedjit and hit speed bumps too fast (which I purposefully did.) Once you eliminate the 3/4" clearance between the SES and the axle you'll feel the extra stiffness right away, but it was not a shocking hit. I'd describe it as "authoritative." I'm happy. 566992
Very good product to replace stock bump stops that were worthless. Installed in driveway in about 20 minutes. Took longer to jack up truck and place jack stand in for safety, than to switch out product. Have 1/2-3/4” clearance. So it gives a truck ride.... but it’s a truck and it’s used as a truck! Very happy camper tower. Buy them, they're great! 553741
I ordered the product late one evening. When I received confirmation I noticed that I had reversed the the bill to: and ship to: immediately e-mailed CS as the office was closed. Very early the next morning I received a call from e-trailer and they immediately took, care of the situation and I had my order in two days, in Alaska! Have not yet installed the product. 210976
Easy installation. System works as advertised. No load ride is the same as without a load. Loaded the system controls and slows the amount of travel the suspension can travel.
Peter S - 07/10/2016Easy to install. Once placed the order I sprayed the nuts in the old ones with rust bister. When the new one arrived the old one can off with no problem and the new ones went on just as easy. Delivery was on time as promised. I have not hooked up the travel trailer yet but am positive these will correct my sag problem. Install time approx. 40 minutes. 102598
After a year the product is still working great. I have had no problems with the product and it does the job that I wanted it to do. Great product.
TomS - 10/04/2014Very happy with my timbrens and the prompt order and delivery of them. I have them installed and look forward to towing my trailer next week. Thank you. 323424
took about 30 minutes to install,most of that time spent removing old stops. Have not tried product under load, sure its going to make a huge difference, I do not see any difference in the unloaded ride after the installation. May I add etrailer's customer service is second to none.. 542170
Very expensive product that does very little good for my truck. The gap between the timbrens and the frame is so large that it takes a very heavy load before they begin to assist. They end up acting like the factory bumpers on steroids. I can't pull my 410 pound tongue weight camper with weight distribution bars at night without being flashed by people who think I have my high beams on. Very disappointed. 315263
I'm very pleased with the functionality of these. I pull a camper that pushes the limits of my Silverado and these really helped control the overall handling. They were also very easy to install. Kudos Timbren! 560527
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. 488613
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! 47330
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 - 08/07/2014How does your truck ride without A load?
-- comment by: Manny - 12/06/2015I was pleasantly surprised to find the installation procedure to be even simpler than the instructions sent with the "Timbrens". So easy even a cave man could do it. Same with the mirror extensions, very simple to install. I can't provide useful feedback (or a meaningful rating) regarding how well these products work. I haven't had a chance to use either the timbren system or the mirrors. My first trip with the trailer will be late September. I'll let you know when I get back....thanks. Dave G 99667
Unfortunately, I ended up returning the timbrens and replaced them with the Firestone Air Shocks. The Timbrens worked fine when hauling the trailer. However, without a load on the truck, the timbrens prevented the shock absorbers from engaging when needed and the resulting ride was very uncomfortable. The air shocks are the way to go if you only need the extra suspension on occasion. Thanks. dg
Dave G - 09/12/2014Second set of Timbren’s that I have purchased for a different truck. Prefer these over air bags. Things can go wrong with air bags like loss of air, air bag punctured. These Timbren’s are made of very hard and durable rubber that can hold massive weight. These took the sag out of the back end of my truck when I hook up the camper. Sway and drift in the front end of my truck when towing is gone now. I feel like I in control of my truck when towing. These even helped with sway during towing. Not too difficult to install. Once you have the truck lifted, it took about 10-15 Mins per side to finish the installation. etrailer had them shipping amdnat my door in two days! The right package arrived for my specific Chevy Truck. Priced very fairly too. Thanks etrailer! 522266
Purchased to improve sagging on 2008 Silverado, 1500 when pulling a 25 camper. Tongue weight is 285 lbs. Mounting went well, improved pulling, but probably should have purchased air suspension to decrease sagging. It helped, but not to the level I am comfortable with for $200. 102871
I have waited till I had a heavy on the truck to review this product, it did a great job loaded. On a smooth road I can not tell any difference in the ride of the truck with no load. It is pretty stiff when you hit a big bump with no load. Installation was very easy. Overall I am very satisfied with this product. 504926
Installed last spring and made a world of difference towing our travel trailer. With the hitch weight close to 1,000lbs the timbren springs made the truck handle much better reducing bounce and better feel of road. In process of updating my truck and will be installing on the new one as well. 495499
Just put them on and only took 40 minutes to complete. That includes getting tools out and putting up. Straight forward instructions with only one exception: The new bolt is a 14m the one you take out is a 10m as stated with the threads being the same. Have not tried out yet with a load. 358037
Great...took the bounce out of my ride when hooked up to my RV. Would recommend
Billy M - 03/24/2018Etrailer 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. 78488
I ordered these on July 4th (Wed) and received them on Friday. As always I got very fast shipping from etrailer.com. I installed these today on my 2009 Sierra 1500. I pull a 20ft enclosed trailer all around the mid-west and up and down the East cost. I've continually been adding things to the trailer so lately the rear of the truck has started to sag a bit when towing. This product seemed like a reasonable way to help remove the sag. I measured the truck in a couple of places near the back with the trailer hooked up prior to installation. After installation the sag was reduced by an inch to inch and a half which is what I was looking for. The truck is now very level with trailer attached. Installation was very easy as the mounting point is easy to get to. I did one side at a time by jacking up that side and removing the tire/wheel. I probably could have done it without removing the wheel, but this just made it that much easier. Remove one 10mm bolt on the original bump stop and then bolt on the new part. Tighten and you're done (well, I had to put the wheel back on, etc.) I did the whole thing in about 40 minutes. I haven't pulled the trailer yet with these installed, but I've already gotten the primary result out of the purchase which is to remove the sag in the truck when the trailer is attached. 47122
Easy to install and works exactly how I wanted. 1.25” clearance w/o a load on them. After connecting my enclosed trailer to my Chevy Silverado 1500, they were flush. Truck drives w/o the front being ‘squirly’ and the rear saggy. Nice and level. 499823
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. 319774
Easy to install. bumpers didn’t touch axle with boat attached. Loaded with fire wood and bumpers were in contact. when driving with fire wood load on truck the truck seemed to bounce on the bumpers and was a little rougher a ride than normal but the back of the truck did not sag like it did without the Timbrens installed. Not quit the same as helper springs but they didn’t jack the back of the truck up like the helpers, so I didn’t have to raise the front of the truck to Level it when empty. Ride is great when empty and I don’t have a load on it often so they’re doing the job. 502190
Installed last night in under 30 minutes very happy! 518226
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 518566
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 307541
Still a happy camper after a year, and rolling along comfortably. Towing time has increased and timbrens still smooth.
Larry S - 10/17/2017Super Fast shipping. Ordered on Monday( a holiday) and reviewed Tuesday afternoon. Very easy install. Thank you. 67446
how is the ride without weight?
-- comment by: Orville W - 12/12/2015I 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. 170614
This has proved perfect for my application of towing our yacht. Leveled it up perfectly. Installed just as instructed. 479111
Tough to decide, Timbrens or air suspension. I opted for Timbens in part because of price, but also no maintenance, while knowing there might be a trade-off in fine tuning the ride. I installed the Timbrens on an '09 Silverado C1500 crewcab, pulling a '13 Springdale 247FWRLLS. Last measured pin weight was 1,120 lbs. Install time was 14 minutes, clock started after purchasing and cutting a piece of 4x4 to help jack up the frame, allowing access to the space. Before Timbrens, 2" drop in bed height after hitching 5th wheel. After Timbren install, 1" drop. Ride unhitched is mostly unchanged, the bigger bumps transmit a more firm feel as the Timbrens connect though. When hitched to the 5th wheel, overall smoother, more confident ride. I'm happy with the purchase. Thank you eTrailer.com for the fast and dependable service you are known for! Tom Round Rock, TX 54799
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'. 659714
etrailer.com provide a very good shopping experience. The web site is organized well and search capabilities are easy and intuitive. Response times are fast. They have a great selection of products. They have great prices! They ship very quickly. And they follow up to ensure delivery and customer satisfaction. This is my third product buying experience with them and I've been a delighted customer each time! 658054
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. 656849
The installation was easy. It arrived on time. I installed it the same day, because we were leaving on the 5th wheel the next day. The ride is much more comfortable. 651820
Installed in less than 30 min. Feels a lot better with no sagging. 643119
Installing this was easy much bigger then the stock ones, can’t wait to tow with these 615603
Very easy to install. I got the product in two days. Love etrailer products. THANKS. 612167
The Timbren suspension system was very easy to install and much better than factory suspension parts. I have not loaded my pickup down yet but there is no way it won't be better with the new parts installed. 611904
Very happy. 607679
Easy to install and keeps the rear from saging. Seems to help with sway control when pulling my 30 ft camper. Does make the ride a little harsher but worth it. Highly recommend. 595296
Extremely easy to install. Haven't put a load on the truck yet because my travel trailer is still in the shop. 591716
Etrailer shipped very fast! Awesome people to deal with. The install went just as fast! Probably 20 minutes. I used a farm jack on the trailer hitch to bring both rear wheels up enough to have room to work. I put jack stands under the hitch for safety. Didn’t need to remove the wheels and they weren’t off the ground. Removed the old stop and attached the new ones. Simple! Test drove (in the rain) with nothing in the bed and never felt it till I hit a speed bump. Felt a little bump. I’ll be taking my RV out in a week. Looking forward to seeing what it will do for that. This was put on a 2018 GMC 1500 with big tow package. 581466
Thay do not touch rear housing after loading One half inch gap Ronnie dobbins 572745
There should not be a gap when the truck is loaded. When the truck is unloaded the 1/2 inch gap is normal. It sounds like you need a 1/2 inch spacer part # TA25722-90P00
Timbren 1/2" Spacer for Raised Frame Vehicles
$8.49. The spacer is designed for lifted trucks to ensure the spring will engage when the truck is loaded.
Heather A - 10/24/2018Little bit rough on bumps but stabilize truck well 569617
easy to install, Solved my trailer bouncing over bumps problem. 568525
A bit stiffer then what i expected when not hauling or pulling a trailer. Otherwise, very easy to install. 568423
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