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Timbren Rear Suspension Enhancement System

Item # TGMRCK25S

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Retail:$252.55

Our Price: $214.67

Vehicle Suspension

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Timbren Rear Suspension Enhancement System Jounce-Style Springs TGMRCK25S
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Timbren Rear Suspension Enhancement System Jounce-Style Springs TGMRCK25S
Vehicle Suspension TGMRCK25S - Jounce-Style Springs - Timbren
Vehicle Suspension TGMRCK25S - Standard Duty - Timbren
Timbren Vehicle Suspension - TGMRCK25S
Timbren Rear Suspension Enhancement System Jounce-Style Springs TGMRCK25S
Timbren Vehicle Suspension - TGMRCK25S
Timbren Rear Suspension Enhancement System Jounce-Style Springs TGMRCK25S
Timbren Rear Suspension Enhancement System Standard Duty TGMRCK25S
Timbren Rear Axle Suspension Enhancement - TGMRCK25S
TGMRCK25S - Jounce-Style Springs Timbren Vehicle Suspension
TGMRCK25S - Standard Duty Timbren Vehicle Suspension
Timbren Jounce-Style Springs Vehicle Suspension - TGMRCK25S
Timbren Vehicle Suspension - TGMRCK25S

In Use/Installed

TGMRCK25S - Jounce-Style Springs Timbren Rear Axle Suspension Enhancement on 2005 Chevrolet Silverado
Timbren Vehicle Suspension - TGMRCK25S on 2005 Chevrolet Silverado
Timbren Rear Suspension Enhancement System Standard Duty TGMRCK25S on 2005 Chevrolet Silverado
TGMRCK25S - Jounce-Style Springs Timbren Rear Axle Suspension Enhancement on 2005 Chevrolet Silverado
Timbren Jounce-Style Springs Vehicle Suspension - TGMRCK25S on 2005 Chevrolet Silverado
Timbren Rear Axle Suspension Enhancement - TGMRCK25S on 2005 Chevrolet Silverado
Vehicle Suspension TGMRCK25S - Jounce-Style Springs - Timbren on 2005 Chevrolet Silverado
TGMRCK25S - Standard Duty Timbren Rear Axle Suspension Enhancement on 2005 Chevrolet Silverado
Timbren Jounce-Style Springs Vehicle Suspension - TGMRCK25S on 2005 Chevrolet Silverado

Customer Photos


  • Timbren
  • Jounce-Style Springs
  • Standard Duty
  • Rear Axle Suspension Enhancement
6,000-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 TGMRCK25S can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (1449)
  • Q & A (47)
  • Videos (3)
  • Photos
  • Why etrailer?

Timbren Vehicle Suspension - TGMRCK25S

6,000-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


Specs:

  • Includes 2 Aeon hollow rubber springs, vehicle-specific brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required
  • Capacity: 6,000 lbs
    • Do not exceed the vehicle's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Bump stop height: 5-1/8"
  • Spacer height: 7/8"
  • 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 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.



GMRCK25S - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren





This Product Fits The Following Vehicles

1999 - 2000 GMC Sierra 1500

1999 - 2000 Chevrolet Silverado 1500

2001 - 2006 GMC Sierra 1500 HD

2007 - 2007 GMC Sierra Classic 1500 HD

2001 - 2006 Chevrolet Silverado 1500 HD

2007 - 2007 Chevrolet Silverado Classic 1500 HD

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

2008 - 2010 GMC Sierra 2500

2007 - 2007 GMC Sierra New Body 2500

2008 - 2010 Chevrolet Silverado 2500

2007 - 2007 Chevrolet Silverado New Body 2500

2001 - 2006 GMC Sierra 2500 HD

2007 - 2007 GMC Sierra Classic 2500 HD

2001 - 2006 Chevrolet Silverado 2500 HD

2007 - 2007 Chevrolet Silverado Classic 2500 HD

1999 - 2004 GMC Sierra 2500 LD

1999 - 2004 Chevrolet Silverado 2500 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.




Video Transcript for Timbren Vehicle Suspension TGMRCK25S Review


Customer Reviews

Timbren Rear Suspension Enhancement System - TGMRCK25S

Average Customer Rating:  4.7 out of 5 stars   (1449 Customer Reviews)

6,000-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.

- TGMRCK25S

by:

2003 GMC Sierra


I installed this on my 03 GMC 2500 Duramax ex cab Long bed. The reason for the installation was, when pulling my 35 foot Hitchhiker 5th at night my headlights at low beam were too high and causing problems for oncoming traffic,. This was caused by deflection in the rear springs. The installation corrected the problem. I carry tools and other equipment in a 29x56 inch in bed tool box that is mounted in the front of the bed, the box loaded weight I would estimate 135lbs. There is also a 20k Reese hitch which is mounted in the bed and I would estimate the weight with the mounting rails as around 100lbs, with there combined weight empty ride is like axle is a solid hookup to the frame via the rubber bumpers. 407596



- TGMRCK25S

by:


Just received the product, everything advertised was there with adequate instructions for installation, had them installed in about 1 hour with no issues. I installed them without jacking up the vehicle as recommended. My recommendation would be to either measure the space available between frame and axel to ensure that you have enough space to install the product with the spacer or without it. In my case no spacer was required to allow the recommended space between the product and axel which in my case was just shy of 3/4 inch. Have not tested the product yet under load to see how effective the product will be. 323731



- TGMRCK25S

by:

Chevy 2500 Silverado


I put these on my 2500 HD Silverado with a Bull Dog ATV carrier and towed a 6000 lb. camper into the mountains this weekend. With the Timbrens and an equalizer hitch, I never felt a better ride on the highway towing before. These are much better than the air bags and no maintenance. My atv rack ways 300 lbs in the bed of the truck and the ride empty was not rough at all. 146740



- TGMRCK25S

by:


I carry a few more tools in the back of my truck than the average person does. My main leaf springs, just touch the overload springs in my day-to-day activity. I wanted to lift the truck up just enough to reposition my springs into the unloaded position. Then when I hooked up our 9,000 lbs. travel trailer the springs would be in a better position to handle the additional load. The Timbren enhancement system worked just the way I had hoped. I would recommend these to anyone who might want to do the same thing that I did. 250764


Comments

After one year of pulling our TT the Timbren springs are working just like the day they were installed. I cant see any compression of the springs after 15,000 miles of towing. I would recommend these springs to my friends.

Joe - 05/18/2017

23979

- TGMRCK25S

by:

Dodge Ram 1500


Great product with poor instructions. If you have a 1500 crew cab chevy with a short bed. you will get the tgmrck25s wich also works for the 2500. It comes with two big rubber spacers, and 2 extra bolts. for the 1500 crew cab DO NOT use the rubber spacers, and use the short bolts. This will give you the correct clearance. Hopefully this is helpful so you do not have to take it back apart and do it over. Instructions are a little on the minimal side, but the product is awesome. 91760



- TGMRCK25S

by:


The Timbrens gave me about 1/2" lift assistance with a 2200# load in my Chevy 2500 pickup. I recently changed to a 5th wheel with 2500# hitch weight. I was very pleased that the Timbrens where sufficient to keep the truck level and I did not need to install air bags. This is my second set of Timbrens. The first I bought at a local shop and had them install them. I bought the latest set from etrailer, and they were very easy to install, and I saved about 30%. 369379



- TGMRCK25S

by:

2007 GMC Sierra New Body


I have not put any weight on it yet so that will come later. I have a 2007 G.M.C. 2500 H.D. and I pull a 40 foot Big Horn Traveler. What I want to talk about is the install. It was quick only took about a hour. Take the tire down and start. Had no problems it went just like the video showed. I did not use the big washer I didn't have enough room.I have about 1 inch of travel before they come in to play so ride is the same. 424753



- TGMRCK25S

by:


I installed a set of these on my 2016 R 2500 to control body roll when hauling my slidein camper. It completly eliminated the body roll when loaded and improved ride when empty. It is very easy to install and works better than described. Both sets arrived within 2 days of order. Another benefit over airbag system is if your truck is on rack for repair the timbren will not be damaged when truck is raised on lift. 463201



- TGMRCK25S

by:


This suspension upgrade is of a high quality both in materials and workmanship. It was easy to install with no modifications needed. It only took me 15 minutes to complete the installation from the time I opened the box. I highly recommend this product and am very satisfied with it. It solved the sag in the rear of my truck and allows me to carry more weight without dragging the rear bumper. 411652



- TGMRCK25S

by:


Etrailer has made a great impression on me. The customer service was spectacular and the shipping was considerably faster than I anticipated, I received my product within 48 hours. I would, without a doubt, recommend them! I actually had to exchange a product, by no fault of etrailer, the transaction took no time and they quickly credited my account. Great company! 168593



- TGMRCK25S

by:


Using only hand tools and a hydraulic jack in my drive way, installing this product was as easy as falling out of a tree. The only issue I have with it is that if the truck springs are weak this is not the answer for your problem. This kit will not stop the upward motion in the springs and consequently will give a beating of a ride. 94529



- TGMRCK25S

by:

2004 Chevy Silverado 2500HD Duramax


I recently purchased and installed this product in my 2004 Silverado 2500HD Duramax. I use it to pull my 32 ft Gooseneck Car Hauler. The Timbren Rear Suspension product works great. My truck has a better feel on the road and is level. Installation is easy. I recently purcased another set for my son's F-350. Great product! 55108



- TGMRCK25S

by:


Awesome price and quick shipping. Product works awesome. Loaded up a 21k lb gooseneck trailer with scrap metal and when I got to the scrap yard I had 20k lbs of metal. Overloaded the trailer and my truck. The truck did not squat at all, the reason I accidentally overloaded it. Highly recommend this product! 155409



- TGMRCK25S

by:


With my truck lifted the rear suspension enhancement system does not touch when in loaded. But once I hook up my trailer or load the bed you can feel the difference less body roll/tipping. And now bed stays much higher when hooked to boat and my heavy equipment trailer. These things are great 392661



- TGMRCK25S

by:


Just installed was very simple. I have a set of front Timbrens that were installed 2 years ago and they great. I expect the rear Timbrens to perform as well as the fronts have. I have ordered from etrailer in the past and I am very satisfied with there service. Thanks Ed 195257



- TGMRCK25S

by:


Very easy to order and even easier to install. Took longer to get out of the box then install. Watched the installation video before I ordered. Does not change the empty ride, but is great with heavy load in truck and even better pulling a trailer. 447682



- TGMRCK25S

by:


I'm extremely happy with this product. Had it installed in a half hour. Going to test them out today hauling a 13,050lb toy hauler 5th wheel. Thank you to etrailer for your outstanding customer service and fast shipping. You guys are great!! 219185



- TGMRCK25S

by:


Great product. Bought these to help level truck while pulling travel trailer and they worked great. Also found that they greatly reduced sway when meeting and passing semi's. Shipping was faster than I ever expected. Highly recommend. 66426



- TGMRCK25S

by:


Have not driven our truck with the rear suspension kit on as it will be completed in the morning. I ordered the front by mistake and Mark at etrailers got me the right kit. Ordered arrived quickly and everything was very expedient. 164105



- TGMRCK25S

by:


Simple solution, passive, no air hoses to leak, and work great! When the truck is loaded, they are not functional, so still the factory ride. When loaded, they contact the axle and provide needed extra load capacity. 426035



- TGMRCK25S

by:


this product is great! I put everything on like the instructions said,the ride was a little stiff so I jacked the back of my 3/4 ton back up took the 1 in.rubber disk off.now the ride is perfict.thank you!!!!!!! 159917



- TGMRCK25S

by:


So far so good. install was not a easy as i thought it took me a 1 1/2 but i was laying on garage floor did not drop spare tire.i like the product towed my 5th wheel and worked as it should. 266980



- TGMRCK25S

by:


VERY EASY installation! Only took about 35 minutes. They perform exactly as described. Would recommend these to anyone needing to keep their truck level while pulling a trailer. 19352



- TGMRCK25S

by:


Great service and great products. Timbren system easy to install and works great made a difference in how trucks handles with trailer attached more stability and less sway. 68923



- TGMRCK25S

by:

2008 Chevrolet Silverado


Purchased these Timbren's for my 08 2500 hd ,shipping was fast even though there was a holiday in the mix . Install was super easy and benefit was immediately obvious . 387107



- TGMRCK25S

by:


just purchased these items and they arrived in two days. amazing. cant wait to install and try them out. thank you etrailer for your great service and fast delivery! 7063



- TGMRCK25S

by:

2009 Chevrolet Silverado


Thank you etrailer or the quality products and prompt response and delivery. 5th wheel hitch setup was easy to install as well as the suspension upgrade.Thank you. 527499



- TGMRCK25S

by:


Put them on my Chevy 2500 for more stability when I pull my 35ft fifth wheel camper. They help control any sway and help keep my truck level. Like them alot. 421318



- TGMRCK25S

by:


I run a salt spreader in the winter on a 3/4 ton truck. It weighs around 4500 pounds full. I wouldnt dare fill the salt hopper all the way up without these. 467638



- TGMRCK25S

by:


Excellent service, great prices and fast shipping. Even had a return of my own fault. No questions asked, quick return and credit. Highly recommend. 405847



- TGMRCK25S

by:


Installed these and felt an instant improvement in the ride with our fifth wheel on the back. Pretty straight forward installations with no drilling. 468036



- TGMRCK25S

by:


This product is amazing much better than having airbags and much cheaper and so easy to install would recommend to anyone. 10 out of 10. 447244



- TGMRCK25S

by:


I like your product, it works well and it out of sight and easy to install. This the second set I have installed and very pleased. 121193



- TGMRCK25S

by:

2010 GMC Sierra


Will put them in every vehicle I get. Huge difference in stability when towing. Very little ride change when empty. 504993



- TGMRCK25S

by:

2010 GMC Sierra


Will put them in every vehicle I get. Huge difference in stability when towing. Very little ride change when empty. 504992



- TGMRCK25S

by:


Easy to install and work great! Very impressed with them! The ride is great even with the camper and boat in tow! 44484



- TGMRCK25S

by:

2007 Chevrolet Silverado Classic


Highly recommended if your going to do any towing, took the squat out of my truck when pulling my 5th wheel 502081



- TGMRCK25S

by:


Excellent product. Just what I needed. Etrailer great company to deal with very informative. Thank you. 378804



- TGMRCK25S

by:


This product is what it says it is. It was easy toinstall and works great for my aplication 81265



- TGMRCK25S

by:

2006 Chevrolet Silverado


Yes I like them they do a great job and was easily installed directions was easy to follow 524280



- TGMRCK25S

by:


Appears to be as described. Helpful video on the website showed installation process 181812



- TGMRCK25S

by:


Fit and functions as described. Installation was simple on my '05 Silverado. 565921



- TGMRCK25S

by:


Easy to install and works good with a heavy load in the bed of the truck. 275999



- TGMRCK25S

by:


Easy to install and works good with a heavy load in the bed of the truck. 275997



- TGMRCK25S

by:


Simple to install I was done in 15 minutes and performed like I expected. 150635



- TGMRCK25S

by:

2005 Chevrolet Silverado


Easy to install. Half hour and they support my camper great ! 509711



- TGMRCK25S

by:


Easy installation. Good quality. 210390



- TGMRCK25S

by:


Went on easy. Works great. 397964



- TGMRCK25S

by:


Perfect fit, works great 143188



- TDR1500DQ

by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I have attached the Timbren product to my 2012 Dodge Ram and am very impressed with the product. etrailer answered my question that I needed to know if the Timbren product would take the squat out of my truck when I hook up my 5th wheel rv. The proof is in the attached pictures I took to share with you and potential customers. Your customer service & product knowledge is outstanding and that is why I am a faithful customer. As far as the installation of the product, I could not find an easier thing to do....It's harder to change a light bulb! Of course your installation video was very informative which made things a lot easier. 79715


Comments

Helped make my decision a no brainer....thanks for the pics they sealed the deal.

-- comment by: James T - 06/14/2013

1641
Comments

Fantastic....The truck drives like a dream! If and when I hit any potholes or bumps, of course you still feel them, but the control is there with no fish tailing. As far as pulling my 5th wheel, it feels like everything is one unit and floats right along!

Ron L - 05/10/2014

4055
Comments

thanks Ron. Great information and you helped me with my decision.

-- comment by: Mike L - 12/28/2014

8252
Comments

Very good illustration and explanation. I have a 5th wheel and am experiencing the squat problem. Question: Is the installation strictly a friction fit or do I have to install a bolt with nut?

-- comment by: John T - 05/09/2015

11538
Comments

For John T. They are a friction fit, installed mine in less than 15 min. Slight harder ride when unloaded, but they work perfectly for carrying the load of the trailer. Highly recommend.

-- comment by: Tony O - 05/27/2015

12084
Comments

Ive been debating pulling a fifth wheel with a 1500. What size trailer do you have? What is the weight and pin weight, if you dont mind me asking?

-- comment by: Travis - 03/15/2016

17113
97
1649
Show More Reviews

Ask the Experts about this Timbren Vehicle Suspension
Do you have a question about this Vehicle Suspension?


  • Can a 2008 Chevy Silverado 2500HD Tow a 16,500 Pound 5th Wheel Trailer
  • The GVWR of a vehicle is set in stone. There is nothing you can do to increase the capacity short of replacing the axle, suspension, and other load bearing and drive train components. What suspension enhancement like # TGMRCK25S does is help support the load and keep the rear end from sagging. Since you have a 3/4 ton truck, you are going to be able to tow just about anything. Consult the vehicle owners manual for the towing capacities of the truck. The gross COMBINED vehicle weight...
    view full answer...

  • Suspension Enhancement for a 2000 Chevy Silverado 2500 Light Duty
  • The heavy duty suspension packages typically include overload springs. This is an additional spring or springs that will be either on top of or on the bottom of the leaf spring stack on a truck. There could also be other components that are different that can cause the truck to ride higher. Since you do not want to worry about a compressor or adding/removing air I recommend an Air Lift brand jounce style spring kit, # AL52202. These are helper springs that do not take air and they are...
    view full answer...

  • Will the Timbren Rear Suspension Enhancement # TGMRCK25S Fit a 2000 Chevy Silverado 2500
  • The Timbren Rear Suspension Springs, # TGMRCK25S, will install on your 2000 Chevrolet Silverado LS 2500 HD without needing to drill new holes. The top of the mounting brackets for the Timbren springs have two holes that will use the existing holes from the factory bump stop. The underside of the mounting bracket has the round surface where the Timbren spring attaches using one bolt. I have attached an image from the installation instructions showing how the Timbren mounting bracket...
    view full answer...

  • When Are Rubber Spacers Required to Install Timbren Rear Axle Suspension Kit # TGMRCK25S
  • The Timbren Rear Suspension Enhancement System # TGMRCK25S is a correct fit for your 2005 Chevrolet Silverado 2500 whether it is a 2WD or a 4WD version. This kit will install without need for the included 7/8-inch thick spacers UNLESS the truck has a suspension lift kit installed already. In this case you'd need to add spacers to make up for that difference in height between the axle and frame. If the truck is standard and has no suspension lift then the spacers will not be needed.
    view full answer...

  • Spacer Needed to Install Timbren # TGMRCK25S in 2004 GMC Sierra with 9-1/4 In. from Frame to Axle
  • My technical contact at Timbren advises that based on the information you provided as to the frame-to-axle clearance on your 2004 GMC Sierra (9-1/4 inches) you will need to use their 1-inch spacers, part # A25723-90AH00, along with their Rear Suspension Kit # TGMRCK25S. You will need to order a quantity of 2 spacers.
    view full answer...

  • Will Timbren Spring, Part # TGMRCK25S, Fit 2009 GMC Sierra with Turnover Ball and 5th Wheel Hitch
  • My contact at Timbren confirmed that their Rear Suspension Enhancement System, part # TGMRCK25S, will work with your 2009 GMC Sierra that is equipped with a BandW turnover ball and 5th wheel hitch. Since this kit installs in the same location as the stock bump stops (which are removed) there will be no clearance issues with your hitches. This kit includes the rubber springs, mounting brackets and required hardware and installs without drilling. Please note that this suspension kit...
    view full answer...

  • No Gap Between Timbren Suspension System And Axle On 2008 Chevrolet Silverado 2500HD
  • Per the instructions for the Timbren Suspension System, part # TGMRCK25S, on medium and heavy-duty trucks there will be constant contact and the system will have no gap. It sounds like you have your system installed correctly and have nothing to worry about.
    view full answer...

  • Can Timbren Springs # TGMRCK25S Be Used in Place of Weight Distribution on 2005 Chevy Silverado
  • A suspension enhancement system like the Timbren Springs, part # TGMRCK25S, you have referenced, is primarily designed to suspend the weight of anything carried on your 2005 Chevrolet Silverado 2500. Although they would indeed eliminate the sag on the rear of your vehicle, the tongue weight of the travel trailer applied to the rear axle of your Silverado would lower the amount of the vehicle weight applied to the front axle. This is potentially dangerous because shifting too much weight...
    view full answer...

  • Suspension Enhancement to Fit 2002 GMC Sierra Denali Extended Cab with Quadrasteer
  • I confirmed with Timbren that the correct kit for your 2002 GMC Sierra Denali is # TGMRCK25S. It will fit with your extended cab and work great with the Quadrasteer.
    view full answer...

  • Timbren Rear Suspension Enhancement System for a 2003 Chevrolet 2500 HD Silverado
  • The correct kit for your 2003 Silverado, 2500 HD with long Bed, is the Timbren Rear Suspension Enhancement System, # TGMRCK25S, which is the correct kit for 2 and 4 wheel drive models. We have a video installation that should be helpful and installation instructions for you to look over, see links. The kit you referred to is designed for 2500 Service vehicles only. Another option for your vehicle is the SumoSprings Custom Helper Springs Kit, # SSR-201, which is a good option if your...
    view full answer...

  • Fifth Wheel Hitch Recommendation for 2005 Chevrolet Silverado 1500 LD 6.5 Foot Bed
  • First, I recommend checking your owner's manual for your Silverado's maximum towing capacity. From what I found, Chevy has determined that fifth wheel and gooseneck trailers should not be towed with the 2005 Silverado 1500 Crew Cab. For example, The owner's manual for the Silverado 1500 Crew Cab, 4 wheel drive, 5800 V8, with an axle ratio of 4.10 lists a maximum towing capacity for the vehicle of 8,400 pounds. So as to not damage your truck, I recommend making sure the gross towing weight...
    view full answer...

  • Suspension Enhancement Recommendation for Towing a 5th Wheel Trailer with a 1999 GMC Z71 Sierra
  • The only option we have at this time for your 1999 Sierra 3 door extended cab short box Z71 with 3 inch lift is the Timbren Vehicle Suspension. You will need the Timbren Rear Suspension Enhancement, item # TGMRCK25S, along with a custom kit to accommodate the 3 inch lift. To order the custom Timbren kit you will need to call etrailer.com Customer Service department, see link, with the following information at hand: Year, make, and model of your vehicle Whether it is 2-wheel or 4-wheel...
    view full answer...

  • Where Does Timbren Suspension Enhancement Install on a 2007 Chevy Silverado Classic
  • The Timbren Rear Suspension Enhancement System, # TGMRCK25S, mounts to the bottom of the frame rail, not to the outside of the frame rail. Under load the bottom of the Timbren spring should only contact the axle. I have included a link to the installation details for you. I have also included a link to our FAQ article on Timbren systems. This system is designed to fit HD models only. If you do not have an HD model, you would use # TGMRCK15S.
    view full answer...

  • Will Timbren part# TGMRCK25S fit on a 2007 Chevy Silverado Classic 3500
  • The difference between the 2007 Chevy Silverado 2500 and the 3500 series trucks is the weight capacity. The 3500 is going to have a higher weight capacity than the 2500. I spoke with the engineer at Timbren and he told me that the TImbren part # TGMRCK25S will fit on your 2007 Chevy Silverado Classic 3500, because the Timbren springs for the 2500 and 3500 models will install the same way on both truck models. These springs were tested up to 6,000 pounds and work well within those guidelines....
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  • Comparing Timbren Kits GMRCK25S & GMRCK15S for 2003 Silverado 1500 ZR71
  • Timbren kit # TGMRCK25S fits the 4WD version of your Silverado 1500LD while kit # TGMRCK15S fits the 2WD version. These kits provide progressive resistance when under load to help stiffen and support your OEM suspension, especially useful for cargo loads in the bed, but they do not add weight capacity to the vehicle. Rear-end sag from pulling a travel trailer is best handled by a weight distribution/sway control system rather than a set of jounce springs. A properly-tuned WD/SC system...
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  • Suspension Enhancement for a 2005 Chevy Silverado 2500HD Diesel and Different Trailer Types
  • To start, adding a suspension lift on your 2005 Chevy Silverado 2500HD is going to require either a custom suspension enhancement kit or spacers because using a regular suspension enhancement kit on a suspension lifted vehicle would mean the helper springs would not engage when they are supposed to. Adding a lift can also make the towing capacity unknown (most likely lowers it) so I would not recommend it. Considering that you tow different loads the best option would be to go with air...
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  • Suspension Enhancement for a 2003 GMC Sierra 2500 HD Hauling a Trailer and Truck Bed Camper
  • The Timbren Rear Suspension Enhancement System is a great way to assist your trucks suspension when carrying a camper and towing. I use a set of the Timbren springs on my truck when I tow and I would recommend them for anyone towing a trailer or carrying a camper. The Timbren System, # TGMRCK25S, is the correct system for your 2003 GMC Sierra 2500 HD Crew Cab 4X4. The important thing to remember when adding a rear suspension enhancement system is that it will not increase the weight...
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  • Will Timbren Kit Fit 2008 GMC Sierra 2500HD with Body Lift
  • For body lifts like what you have Timbrens work just fine as-is without needing type of adapter or spacer. That means the part # TGMRCK25S will fit your 2008 GMC Sierra and work well.
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  • Timbren Suspension Enhancement for Slide-In Camper Carried by 2003 Chevy Silverado 2500HD
  • According to my Timbren representative, the capacity of the # TGMRTT35S springs is 8,000 lbs, instead of the 12,000 lb figure we had listed in error. I would recommend the 8K capacity # TGMRTT35S for use with your slide-in camper. According to Timbren's installation instructions, the 8K springs are meant to replace the entire bump stop assembly on the truck, as shown in the installation instructions I've linked to. The # TGMRTT35S includes the necessary hardware and spacers for installation.
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  • Can Timbren Suspension Enhancement be Used with SuperSprings on a 2007 Chevy Silverado Classic 3500
  • The reason why you are not seeing all of that rear sag being taken care of with the SuperSprings Custom Suspension Stabilizer installed is because the part with the highest weight capacity for your 2007 Chevrolet Silverado 3500 is part # SSA245-2. Since this part has a weight capacity of 4,000 lbs it will not be able to help as much as it would if your camper did not weight over 4,000 lbs. The SuperSprings product that you have on your 3500 will not allow some Timbren Suspension enhancement...
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  • Will the Timbren Springs # TGMRCK25S Work on a 2001 Chevy Silverado 1500 with Firestone Air Springs
  • I spoke with my contact at Timbren, and he said that the Timbren suspension can work with the Firestone air springs as long as there is room to mount the rubber springs above the rear axle. The Timbren rubber springs will replace the axle bump stops on the vehicles frame. As long as you still have the bump stops on your 2001 Chevrolet Silverado 1500, you will be able to use the Timbren Vehicle Suspension, part # TGMRCK25S. If the bump stops have been removed then the Timbren suspension...
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  • Timbren Kit Fit Recommendation for 2007 Chevy Silverado Classic 2500HD
  • For your 2007 Chevy Silverado 2500HD Classic the Timbren kit you need is the part # TGMRCK25S. Since you have the factory suspension on the truck this kit will fit and work well. I attached an install video for this kit on a 2007 Chevy Silverado 2500HD very similar to yours.
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  • Will Timbren Springs Keep Leaf Springs from Flattening Out on 2007 Chevy Silverado Classic 3/4 Ton
  • The leaf spring stack on the 2007 Chevy Silverado Classic 2500HD does not seem to bow very much as it is but with the Timbren springs installed, # TGMRCK25S, it would keep them from flattening out as much as they do now on your truck. The Timbren spring will engage the axle before the spring stack is compressed for a more stable ride. I have linked a video showing installation of this kit for you and a link to our help article on Timbren springs.
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  • What Timbren Rear Axle Suspension Kit Fits 2006 Chevrolet Silverado 1500HD 4X4 Extended Cab
  • Since your Silverado is the 4X4 1500HD with extended cab the correct rear axle Timbren kit is part # TGMRCK25S. I confirmed this with my contact at Timbren. The kit you referenced, # TGMRCK15S, is the correct kit for 2-door trucks without the extended cab. These Timbren helper springs install without drilling and will work with or without factory top overload springs. Installation requires permanent removal of the factory bump stops. The video link provided will show you the installation...
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  • Timbren Suspension Enhancement System for 2007 Silverado 1500
  • The part # you mentioned, TGMRTT35C is intended for use on the 2500 or 3500 cab and chassis model only. If your 2007 Silverado 1500 is the LD model, use part # TGMRCK15S. If you have the HD model, you would need part # TGMRCK25S. The Timbren Suspension Enhancement System is pretty simple to install. For your convenience, I will include links below for the installation instructions.
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  • Suspension Enhancement for a 2007 Chevy Silverado Classic Towing a 5th Wheel Trailer
  • The pin weight of a 5th wheel trailer is typically going to be much less than the 12,000 pounds springs # TGMRTT35S are rated for. So there is really no need for such a high capacity spring set. I recommend Timbren springs # TGMRCK15S rated for 3,600 pounds. This set should not interfere with the 5th wheel install kit because they mount to the bottom of the frame. I have linked a video showing a typical installation and a link to the instructions for you. If you want a little more...
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  • Recommended Suspension Enhancement System For 2003 GMC Sierra 4X4 With Quadrasteer
  • For a suspension enhancement system that will not interfere with the ride of your 2003 Sierra when empty I recommend the Timbren Rear Suspension Enhancement System, part # TGMRCK25S. This replaces the axle bump stops on your truck, and per my contact at Timbren does not interfere with the Quadrasteer system. These springs require no maintenance and act independently for off-center loads in the rear of your truck. The become more rigid when additional weight is added to the truck. I...
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  • Recommended Suspension Enhancement for 2006 GMC Sierra 1500 with 5th Wheel Trailer Hitch
  • For your 2006 GMC Sierra 1500, the air bag systems available are not compatible with an in-bed hitch. So my recommendation to help your rear suspension when towing your 5th wheel is the Timbren Rear Suspension Enhancement System # TGMRCK25S. These springs will install where your factory bump stops are, so your slightly wider tires will not be an issue. These springs will absorb road shock and take the brunt of the load to come alongside your current factory suspension. The will...
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  • Spacer Recommendation for a 2006 Chevy 2500HD with a 2 in Lift Installing Timbrens
  • What you would want to use is a Timbren Spacer for Raised vehicles # A25723-90AH00. This spacer is 1 inch thick so you would want to use two of them since you have a 2 inch lift. For the rear you would want the Timbren Rear Suspension System # TGMRCK25S, for the front you would want the Timbren Front Suspension System # TGMFK25S. Since you will need 2 spacers per Timbren and you plan on putting them on the front and rear axles is looks like you would need a total of 8 spacers.
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Info for this part was:

Photos by:
Theodore B
Expert Research:
Michael L
Expert Research:
Robert G
Expert Research:
Michael H
Expert Research:
Jeff D
Expert Research:
Jameson C
Video by:
Joshua S
Test Fit:
Nicholas E
Expert Research:
John H
Expert Research:
Adam R
Video by:
Kathleen M
Installed by:
Cole B
Expert Research:
Lori W
Expert Research:
Rachael H
Expert Research:
Jeffrey L
Video Edited:
Sue W
Updated by:
Mary E
Photos by:
Jeffrey L
Video by:
Jonathan Y
Installed by:
Robert C

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