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

Timbren Rear Suspension Enhancement System

Item # TGMRCK25S
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Vehicle Suspension

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Timbren Rear Suspension Enhancement System Jounce-Style Springs TGMRCK25S
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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 (1969)
  • Q & A (62)
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Timbren Vehicle Suspension - TGMRCK25S

  • Timbren
  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Standard Duty

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




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 Front and Rear Suspension Enhancement Systems Review

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..


Customer Reviews

Timbren Rear Suspension Enhancement System - TGMRCK25S

Average Customer Rating:  4.7 out of 5 stars   (1969 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:

The installation was on a 2009 Silverado 2500 HD 4X4 and the product fit perfectly! Installing them was a snap! They really made a difference when towing my 5th wheel RV. 680684



- TGMRCK25S
by:
Ram 4500

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:

Best investment for my suspension. I have had them for over a year and haven’t broken any springs these were my third set of springs. I can fit 7-1/2 yards of wood chips on a full load averaging 6200 lbs. and tow a 6800 lbs chipper!!! 610331



- TGMRCK25S
by:
Nissan Leaf

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:
2003 Chevrolet Silverado 2500

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:
2006 Chevrolet Silverado 2500

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:
2007 Chevrolet Silverado

The product is great. It has leveled my 2007 Chevy Silverado 2500 classic, while towing. As expected, the ride is much stiffer during travel without the trailer. The shipping was very fast. Ordered on Wednesday and arrived Friday the same week. Packaging was a diiferent issue. The box was torn upon arrival and hardware was missing(see picture). Used the additional spacer for a inch of extra ride height, since I tow every day. Overall, the product is serving me well. 745294



- TGMRCK25S
by:

Works as expected. 736931



- TGMRCK25S
by:

These look like they will cure the evils of the heavy load God's. Easy to install and they look like they are quite stout. I will find out in a couple of weeks from now. 707673



- TGMRCK25S
by:

Removed my old air bags after fighting leaks for 6 months. Installed the solid rubber TGMRCK25S. Truck rides a little stiffer,but the body roll has been almost eliminated. Lot more stable in turns. My truck is a bit overloaded with my camper but is level and not mushy as before. Great product. 671192



- TGMRCK25S
by:
2001 Chevrolet Silverado

What a wonderful product, affordable maintainance free towing ride height solution. Great communication from etrailer. Good product , fair price and no drama. Love em. 644196



- TGMRCK25S
by:
2003 Volkswagen CC

I have a 2003 GMC 2500HD Duramax 4x4 CC. I put on super springs when the truck was new. I pull a Alpenlite 5 wheel, with a pin weight over 2300 lbs I wanted to change from super springs to timbrens to loose weight and retain support for suspension. I installed timbrens without the spacer and they rested on the axle pad. The ride wasn’t awful but more harsh then with the super springs. I reinstalled the super springs and this gave me an 1 1/4” space from timbrens and axle. I haven’t pulled the 5 th wheel yet. I think with both on should help with sag. 637928



- TGMRCK25S
by:
Chevrolet Silverado

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



- 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:
2006 Chevrolet Silverado

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



- TGMRCK25S
by:
2005 Chevrolet Silverado

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



- 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:
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:

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:
2016 Chevrolet Silverado 2500

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


Comments
I am completly satisfied with the timbren suspension aid. It stopped the body roll on my truck wirh my slidein camper on. Thanks for selling a quality product.
Don - 12/28/2018

48029

- TGMRCK25S
by:
2007 Chevrolet Silverado Classic

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:
2007 GMC Sierra Classic

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:
2005 Chevrolet Silverado

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:
2007 Chevrolet Silverado 2500

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


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Ask the Experts about this Timbren Vehicle Suspension

  • Will the Timbren Rear Suspension Enhancement System Fit a Lowered 2001 Chevy Silverado
    The overall height of the Timbren Rear Suspension Enhancement System part # TGMRCK25S is 7-1/4" with the included spacer installed or 6-1/4" without the included spacer installed. If the 6-1/4" is too tall for your lowered 2001 Chevrolet Silverado you can use the SumoSprings Solo Custom Helper Springs part # SSR-209-40 for 1500 or part # SSR-211-54 for 2500/3500 models. If you take a bread knife, you can trim these down to fit the space you need them to.
    view full answer...
  • Correct Timbren Suspension Enhancement for 2007 GMC Sierra 1500
    While we have the correct fitting Timbren Suspension Enhancement for your truck, whichever information you saw was incorrect if it said model DR1500DQ would fit your 2007 GMC Sierra 1500. As noted on our website, that model only fits certain model year Ram trucks. The correct fit will depend on if your 2007 GMC Sierra is the Classic or New Body style: 2007 GMC Sierra 1500HD Classic (4WD or 2WD) - Timbren Rear Suspension Enhancement System # TGMRCK25S 2007 GMC Sierra 1500 New Body...
    view full answer...
  • What Timbrens Fit The 2007 GMC Sierra Classic 3500 Old Body Style Dually
    I did contact Timbren on your behalf who confirmed the Timbren Rear Suspension Enhancement System # TGMRCK25S will fit your 2007 GMC Sierra classic, 3500 Dually with the old body style.
    view full answer...
  • Which Timbren Suspension Enhancement Kit Fits 2013 Chevy Silverado 2500HD
    For your 2013 Chevy Silverado 2500 you actually need a different Timbren part number due to the change in the bump stop that you mentioned. For that you'd need the part # TGMRTT35D instead. I attached a picture that shows how it attaches to the vehicle frame also.
    view full answer...
  • Timbren Suspension System Recommendation for a 2005 Chevy Silverado 1500
    The Timbren suspension system part # TGMRCK25S that you referenced is the correct system for your 2005 Chevy Silverado 1500. For the 1500 crew cab model you would not need to use the spacer, but you can still measure if you like to be certain.
    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...
  • 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...
  • 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...
  • 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.
    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...
  • 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.
    view full answer...
  • Timbren Suspension Enhancement Recommendation for 2008 Chevy Silverado 2500HD
    Timbrens would be the way to go since you are hauling quite a bit of weight. So for your 2008 Chevy Silverado 2500 you'd want the part # TGMRCK25S which can give you up to an additional 6,000 lb of suspension support. You should note that this kit does not give you the ability to have more payload or towing capacity. Just to better support the current capacity of the vehicle. I attached an install video for this kit for you to check out as well. I recommended this kit over the other...
    view full answer...
  • Suspension Enhancement Recommendation for 2004 GMC 2500LD with Quadrasteer
    We have found that the only suspension enhancement kits that fit the GMC trucks with quadrasteer are the Timbrens like part # TGMRCK25S which is a fit for your 2004 GMC Sierra. We have spoken with Firestone and Air Lift a few times on this and they always state they have nothing for the quadrasteer trucks. I attached an install video for you to check out though.
    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...
  • 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...
  • Overall Height of Timbren Spring Kit part # TGMRCK25S
    Timbren likes to recommend 1 inch between the axle and the Timbren when the truck is unloaded. We have found that this works the best. This allows the suspension to feel when the vehicle is unloaded and still gives you support when needed when towing. I spoke to my contact at Timbren and they told me that the overall height of the # TGMRCK25S is 7-1/4 inches
    view full answer...
  • 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...
    view full answer...
  • Suspension Enhancement Recommendation for a 2002 Chevy 2500HD Crew Cab 4X4 w/ 8 ft bed
    The correct Timbren system for your 2002 Chevy Silverado 2500HD 4x4 would be the Timbren Suspension Enhancement System part # TGMRCK25S that you referenced. This will give your rear suspension additional support for when you are towing your fifth wheel trailer.
    view full answer...
  • 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...
    view full answer...
  • 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...
  • 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....
    view full answer...
  • 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.
    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...
  • 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...
    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...
  • Suspension Enhancement Recommendation for 2008 GMC Sierra Towing Fifth Wheel Trailer
    The position of the Companion hitch head won't make a huge difference for the amount of sag you are experiencing but suspension enhancement for your truck will though. The Timbren kit part # TGMRCK25S is a confirmed fit and will work well to reduce the sag you are experiencing. It basically beefs up the rear suspension which will allow your trailer to sit level. I attached an install video for this kit for you to check out as well.
    view full answer...
  • 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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  • Air Suspension For 2004 Chevy 2500 HD 4x4
    I did contact Air Lift on your behalf to check since you already have leaf springs. The Air Lift LoadLifter 5000 Air Helper Springs # AL57275 would be a solid option and will help level your 2004 Chevy Silverado when loaded. One thing they mentioned is you may need a spacer such as # AL52420 if there is lift change when installed. This will really depend on the distance between the upper and lower bracket at ride height, usually 5-7" bracket to bracket. Included are video resources...
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  • Can a 2008 Chevy Silverado Handle a 2400 Pound Slide-in Camper
    The GVWR is the gross vehicle weight rating. This is the most the vehicle can weigh including cargo, passengers, gas, everything. The GAWR is the gross axle weight rating which is 3,950 pounds for the front and 3,750 for the rear. The cargo weight rating could be what the bed itself is rated to carry or what can be carried in the cab. Usually for the bed they use the term payload. Adding helper springs will not increase the capacity of the truck. Since the rear axle is rated for 3,750...
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  • Timbren Rear Suspension Enhancements for a 2004 GMC Sierra 1500 AWD Denali
    As long as the distance from the center of each bolt hole on the bump stop of your 2004 GMC Sierra 1500 AWD Denali is 4-1/2" then the Timbren Rear Suspension Enhancement System part # TGMRCK25S will work for you. In order to install them on your vehicle, you will first need to remove the factory bump stops. This can be done by removing the two nuts located on top of the bump stop on the inside of the frame rail. It may be necessary to soak the nuts in a penetration compound such as...
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Info for this part was:

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

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