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  1. Vehicle Suspension
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Timbren Suspension Enhancement System - Severe Service - Rear Axle

Timbren Suspension Enhancement System - Severe Service - Rear Axle

Our Price: $269.36
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7,000-lb Capacity hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. Provides a comfortable ride by absorbing road shock and improving stability. Ideal for trucks with slide-in campers or an in-bed salt spreader. Great Prices for the best vehicle suspension from Timbren. Timbren Suspension Enhancement System - Severe Service - Rear Axle part number TDRTT1500 can be ordered online at or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension

  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Extra Heavy Duty
  • Timbren

7,000-lb Capacity hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. Provides a comfortable ride by absorbing road shock and improving stability. Ideal for trucks with slide-in campers or an in-bed salt spreader.


  • Improves suspension, handling, and safety
    • Ideal for trucks with slide-in campers or an in-bed salt spreader
  • Provides additional support as needed, so you always get a smooth, comfortable ride
    • Allows the leaf spring ample movement and cushions light loads
    • Becomes more rigid as more weight is added
      • Increases stability - gives you great performance when you are hauling heavy loads
      • Reduces rear sag
  • Works independently - side to side
    • Helps to compensate for off-center loads
    • Reduces body roll when you have to swerve or execute a sharp turn
  • Acts as shock absorber, taking the brunt of bumps and rough roads
    • Extends the life of your suspension
  • Includes 2 Aeon hollow rubber springs, custom-fit brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required


  • Capacity: 7,000 lbs
    • Do not exceed your vehicle's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Limited lifetime warranty - satisfaction guaranteed

An example of sag on a vehicle's rear axle under a heavy load

Whether you're hauling heavy loads in your bed or cargo area or you're 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 the rear axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down to where the bottom of the spring sits, 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.

Animation 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.

An example of a trailers swaying

Because the vehicle handles better with the springs, less turbulence will be passed along to the trailer, and this helps to keep the trailer in line. Your driving comfort is further enhanced if the trailer does begin to sway (from a gust of wind or a passing semi), because the movement from the trailer is not transferred to your vehicle. This also works to make the sway subside more quickly.

An empty truck on a bumpy road without Timbren

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.

DRTT1500 Timbren SES with Aeon Hollow Rubber Springs - Rear Axle - Severe Service

Item # TDRTT1500

Installation Details TDRTT1500 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Timbren Suspension Enhancement System - Severe Service - Rear Axle - TDRTT1500

Average Customer Rating:  4.7 out of 5 stars   (5764 Customer Reviews)

7,000-lb Capacity hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. Provides a comfortable ride by absorbing road shock and improving stability. Ideal for trucks with slide-in campers or an in-bed salt spreader.


I am pleased with the performance as far preventing trailer weight to affect the overall tow height of the truck. However, it does change the overall ride of truck when it is not loaded or towing a trailer. I am currently looking for other options.

Etrailer Expert

Jenny N.


To be honest this is something that we heard with Timbren springs. I noticed that these springs are a heavy-duty spring that are best suited for trucks with slide-in campers or an in-bed salt spreader. Is this what you have? If you are towing quite a bit, then I would recommend considering an air bag system. The air bag system will be in constant contact with the axle which will give a smoother ride. They are going to be a little more expensive then the Timbren springs. The part number that I recommend is part # AL57375. The fit tips for it is that drilling will be needed, it does not fit with the factory Air Suspension system, special tools will be needed, it is compatible with in bed hitches, and it does not fit TRX models. You may also may consider a compressor system like part # AL57375 so that you have access to air on the go.

2014 Ram 1500

Received item 5 days after ordered. Arrived in original packaging in good condition. Very easy install took me about an hour. Key for me was use of 2x4 for final seating.

2015 Ram 1500

Good product! This solved my "sag" and loss of front end control while towing. Much cheaper than buying a new truck...I did get more negative feedback from road conditions but got rid of the bounce from weight moving off and on the front axle. Picture is from before installation.


These are the way to go. Airbags are nice but I never have to worry about leaking lines or bags. My Ram 1500 lowers two inches with the horse trailer gooseneck. Ill never go back to bags. Thanks Guys



The timbres suspension is still working great. I have had no suspension or breaking issues. The rear is a little more sturdy than if I had airbags but that’s what I wanted and it’s great not having to worry about air adjustments or leaking bags. Works great for me.


The product was delwith an open box with contents falling out. Produck itself is perfect and of surpurb quality.

2013 Ram 1500

Easy to install about 15 minutes works great ,stops the rear sag with a trailer, alittle pricy though, but good quality.


Excellent upgrade for 2019 RAMs hauling heavy payload or trailers. Must have rear suspension improvement from OEM bump stops. I've used Timbren on 2013 and 2019 trucks with great results. I will continue to use Timbren on my trucks in the future.

2016 Ram 1500

So far the easiest install I have ever encountered!! Took 15 only because I had to move jack to otherside otherwise in under 10 minutes. I have yet to place trailer on truck, tomorrow is the big test, we'll see how it handles.... huge difference from old one to these, so I expect a huge improvement....


Probably the easiest install I have ever done on my 2019 Classic Ram 1500 Warlock. Took less than 10 minutes and outcome is excellent. I can already tell the difference with the Decked tool box I have in my truck.


Very satisfied with your product.
Was very EZ to install, appox 20 minutes, and that includes setting my jack up. I've sent 2 pictures. The yellow is original bump stop, black is the new ones. Thanx again


Super easy to install legit just poped out poped in no lift needed just crawled under and 5 mins it was done.

Works great so far ill find out when my 30foot foot campers hooked up but for a 16foot trailer with a rzr and quad up on it it did its job.
Not 5 stars because i think this is a 150 to 175 priced product


These work quite nicely if you are carrying a load but when empty the truck rides like a truck. Very ruff ride. I had to switch back to originals because ride was so bad. They are not hard to swap so I swap them for originals when I carry heavy loads.

Etrailer Expert

Jenny N.


You mentioned that the springs were giving you a rough ride when installed and I had a few questions that I wanted to ask. When the springs are installed is there an inch to an inch and a half gap from the bottom of the spring to the contact point on the frame? Are you using the springs for a slide-in camper, salt spreader, or with a mounted crane or other aerial device?



I used the springs to carry stone. Im not sure if there was a full inch but when I had three people in the back they had a ruff ride. I was in the front and didnt feel it as much. Even when there was no one I noticed when I hit bumps that the back wheels rode ruffer -like a truck-. They swap out fairly easy so I can rotate when needed, not ideal but usable.

Etrailer Expert

Jenny N.


I do know that the springs that you have are meant to be used with a trucks that is being used with a slide in camper, salt spreaders, or mounted aerial devices. With the truck carrying stone I would say that is why is works well when loaded however when it is unloaded it will give a stiffer ride. It would be beneficial to look at part # TDR1500DS for your 2016 Ram 1500 4WD. It is rated at 6000 pounds and works with Regular cab models. It would not fit with vehicles that have the factory Air Suspension system.



After a year my answer still stands as I wrote it.


The Timbren is larger and stiffer than the stock suspension cushion. When empty the truck feels normal. It makes my dodge ram 1500 feel more like a three-quarter ton truck when I am towing my travel trailer. There is much less bounce over bridge approaches and less sway. When I loaded the truck bed with mulch the truck rode level rather than having the rear sagging The Timbren was very easy to install I inspected them recently and they appear to be in almost new condition I have recommended it to my friends for towing and carrying heavy loads


These definitely beefed up the suspension for my towing. I don’t have the sag that is did before with the stock parts. Have had them for a year now and no complaints from towing a small enclosed trailer to my RV.



Still holding up strong. Keeps me from having any sag while towing. I tow a small enclosed trailer and our RV. Still going strong.


Le produit s’installe bien.
avec ma roulotte, c’est très inconfortable. Je ne les utilise pas. :(

(The product installs well. However with my trailer, it is very uncomfortable. I don't use them)

Etrailer Expert

Mike L.


This is a Severe Service kit and should only be used on vehicles with a slide-in camper, salt spreader, or those with a mounted crane or other aerial device, such as on a tow truck. The # SSR-307-40 SumoSprings product is made from a softer material and would provide better ride quality when installed on your truck.


A great investment. I keep it inflated at 50lbs and it helps level my truck when I pull my Grand Design 295RL 5th Wheel.

Dodge Ram Pickup

Quick and easy installation. My RAM 1500 remains level while towing a trailer now. Great product if you are only trailering occasionally.

2020 Ram 1500

Product arrived faster than expected and took literally 5 minutes to install. I purchased these for support and stability under load of a 7x14' cargo trailer but have not yet tried this out. 5 stars for delivery and installation.



After a year these have proven to be a great upgrade to the rear suspension of my 2020 RAM 1500. They provide the support and stability needed to haul a 7x14 motorcycle trailer. Ive recently recommended them to a friend with a 18 Raptor and so far are working great for him.


2019 ram 1500 classic and help stop sagging by 2 inches with fully loaded Lance 650 on top

2018 Dodge Ram Pickup

Tow vehicle: 2018 ram crew 6.5 box 5.7 hemi v8 3.92 rear end max tow 9820 lbs
Trailer: 2018 Cougar 27 RES, tw 830lbs, empty 6500lbs, gvw 8,800 lbs
Equilizer E4 weight distribution hitch
Before installing the Timbren I experienced 5 inches drop even with the E4 hitch. Towing in a 20 mph cross wind was difficult above 55 mph, 18 wheelers sucked me over as they passed. After installing the Timbren I had a 2 inch drop, cross winds are much easier to handle and there's hardly any suck when a truck passes.

I've towed the trailer 1500 miles so far on the Timbren. They are easy to install on the Ram and worth every penny they cost. Thanks Etrailer for once again giving me great advice and saving me lots of money by not buying air bags. These work just as well, are maintainence free and far cheaper than air bags.


Great product.



Product has been doing what it is designed to do.

2010 Chevrolet Silverado 1500

24 foot trailer
with eight distribution hitch on a 1500 truck is not bad until it gets windy. I white knuckled a 45 mile drive to the dyno in March with a racecar in 20mph wind. That’s not uncommon. But my truck and trailer didn’t like it.
This product increased the stability by 5 to 10 times.
Highly highly recommend. Super easy to install.
Reduces squat too.

2012 Dodge Ram Pickup

Put a pair of TDRTT1500 on my 2012 Dodge Ram 1500 with a mounted veterinary box. Weight about 1200 lb. Easy to pull original spring, jacked up rear, slipped product in and set back down onto spring and wiggled bumper to seat. Truck now sets level as it should. Great improvement in ride. Stiffer ride, corners better. Made several calls to company. Each time got the right answer. I was skeptical about how easy it would be to do. Done in 20 minutes. Made a believer out of me. Lynn


Perfect fit, easy install. Have not had any issue since install.

2016 Dodge Ram Pickup

I was looking for something for my 2016 Ram 1500 to level out the ride when pulling my travel trailer 33'. I considered the different types of air bags as I had success with them on my Ford. However the installation on the air bags is lengthy. I read up on the Timbren Suspension Enhancement System and decided it was worth a try. The installation says 15 minutes and that is not a joke. All you need is a floor jack and a couple of 2x4's. It took 15 minutes including getting the jack out and put back. Then I hooked up the trailer and the ride height is perfect, it also improved the overall ride when towing. Great product!

Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • 2009 Dodge Ram 1500 Squats when Towing Livestock Trailer
    When vehicle squat is caused bu the tongue weight of a trailer the best solution is to use weight distribution on the trailer. Weight distribution will distribute the tongue weight of the trailer more evenly to all axles of the tow vehicle and trailer and take care of that squat. In order to determine the correct system for you I would need to know the total tongue weight. This is calculated by taking the tongue weight of the trailer when loaded and ready to tow and adding to that the...
    view full answer...
  • Does Using a Timbren Suspension Enhancement System Void My Warranty on a 2022 Ram 1500
    No, use of the Timbren suspension enhancements like the Timbren Rear Suspension Enhancement System # TDRTT1500 will not void your warranty. You are protected by the Federal Magnuson-Moss Warranty Act. This act says if something breaks on your vehicle and you take it in for warranty repair, the dealer must honor your warranty unless whatever you have added to your vehicle or its installation actually caused the problem in question. The Timbren Rear Suspension Enhancement System # TDRTT1500...
    view full answer...
  • Is the Timbren Rear Suspension Enhancement System DRTT1500 Easy to Remove from a 2016 Ram 1500
    The process to remove Timbren Rear Suspension Enhancement System part # TDRTT1500 is very simple. All you will need to do is twist and pull downward on the spring until it pops out of the cup. If you have trouble with this then you can spray the cup down with a soapy water solution. There are no tools required for this but a pry bar could help if the spring gets stuck in the cup. It will not void any warranties. I have attached a video of the install process which if reversed will show...
    view full answer...
  • Which Timbren Suspension Enhancement For 2018 Ram 1500
    Yes. The Timbren Rear Suspension Enhancement System # TDRTT1500 are a confirmed fit on the 2018 Ram 1500, which is the 5th generation of the Ram 1500.
    view full answer...
  • Timbren Recommendation For Pulling 4,500lb Tank With 2016 Ram 1500 4x4 Crew Cab
    I recommend the Timbren Rear Suspension Enhancement System # TDRTT1500 if you don't foresee heavier towing jobs in your future than the 4,500lb tank. The reason being, Timbrens will definitely stiffen your ride when towing which is exactly what they are designed to do with these providing up to 7,000lbs of capacity. However the tradeoff is you give some on ride qualty when not in use so upping the spring capacity is not always without some consequence. If you're only towing on the weekends,...
    view full answer...
  • What is Payload Capacity of 2003 Chevy Silverado 1500
    I looked up the payload capacity of your 2003 Chevy Silverado 1500 and found that it is between 1,288 and 2,173 lbs. So there's a good chance your truck has the capacity with the Timbrens # TDRTT1500 but it's something you'd have to verify by determining your payload capacity. You could give your VIN to a GM dealer and they'd be able to tell pretty easily.
    view full answer...
  • Timbren Rear Suspension For 2019 Ram 1500 With Salt Spreader
    The Timbren Rear Suspension Enhancement that you need for the 2019 Ram 1500 with a salt spreader is part # TDRTT1500. These Timbren Springs are designed for service trucks like your truck with the salt spreader. They have a 7,000 lb capacity and will help to level out the load to reduce rear sag from the heavy salt spreader. I have attached an installation video for your reference.
    view full answer...
  • Height of Timbren TDRTT1500 that Fits 2019 Ram 1500 and Could it Fit Lowered Truck
    The overall height of the Timbren Rear Suspension Enhancement System # TDRTT1500 that you referenced is 4-9/16 inches with the included 1 inch spacer installed. Without the spacer it's 3-9/16 inches. Timbren recommends you have between 1/2 inch to 1 inch of space between the frame of the vehicle and the Timbren when the vehicle is unloaded as this gives the best balance of ride support and unloaded ride quality. So if you measure the distance between your bump stop mount and the axle of...
    view full answer...
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  • Recommendation for Rear Sag on a 2015 Ram 1500 CrewCab With Bed-Slide In
    Good news, I can help you pick out the right vehicle suspension for your setup. The Timbren Suspension systems are an easy no drill solution to correct the issue you are having. I would recommend the # TDRTT1500, because they will help bear the weight of your heavy load day in and day out, and provide the closest distance to factory height like you requested. It is important to note that even after installing this suspension enhancement you should not exceed the weight-carrying capacity...
    view full answer...
  • Shocks on 2015 Ram 1500 Feel Like They are Shot Even After Using Suspension Enhancement
    The Timbren Rear Suspension Enhancement System # TDRTT1500 that you purchased, or any suspension enhancement for that matter, is designed to help improve your suspension, handling, and safety. These just add some extra cushion to help absorb shock for when you hit bumps or are driving on rough roads. Since suspension enhancement is meant to compliment your suspension, if your shocks are shot these will not fix the problem. They will work with a suspension system that is in good working...
    view full answer...
  • Does Timbren Rear Suspension Enhancement TDRTT1500 Include One or Two Springs?
    The Timbren Rear Suspension Enhancement System # TDRTT1500 you were looking at for your 2017 Ram 1500 are indeed sold as pairs and includes everything you need to install them on your truck. I included a video of the # TDRTT1500 for you to take a look at.
    view full answer...
  • Recommendation for Stability While Pulling Flagstaff Travel Trailer with 2010 Dodge Ram
    Using a weight distribution system and suspension enhancement together can cause the two systems to work against each other, so you won't get the full benefits of either system. Your first line of defense against trailer sway is proper loading of the trailer. The tongue weight should be 10 to 15 percent of the gross trailer weight. Heavier items on the bottom and the weight evenly distributed. This is a little harder to do on a travel trailer as opposed to a cargo or flat trailer. Also...
    view full answer...
  • Differences Between Timbren Suspension Enhancement Systems for 2011 Ram 1500 Crew Cab 4x4
    If you are looking for something that will take out the squat at the rear end of the truck when connected to a travel trailer then the best option is weight distribution. But if it is a 5th wheel trailer you will be towing then suspension enhancement would be the way to go. The difference between Timbren systems # TDR1500DQ and # TDRTT1500 subtle. Basically, the one you will want is # TDR1500DQ rated for 6K. The other kit, # TDRTT1500, is designed for service vehicles only like utility...
    view full answer...
  • Which Timbren Suspension Kit to Use for 2015 Ram 1500 Carrying 2,100 lb Slide in Camper
    For your 2015 RAM 1500 I would recommend the Timbren kit part # TDR1500DQ. The part # TDRTT1500 that you referenced is for severe duty vehicles and would give you a very harsh ride. The part # TDR1500DQ will give you the suspension support you need but won't be harsh like the other kit. This kit would be perfect for you because of that. I attached an install video for you to check out as well.
    view full answer...
  • Recommended Rear Timbren Springs for 2019 Ram 1500 2WD Towing Travel Trailer
    The best Timbren Suspension Kit for your 2019 Ram 1500 2WD is the Rear Springs # TDR1500DQ. These will provide plenty of support for the tongue weight from your new trailer, as they have robust 8,600 pound weight capacity. I'm not sure how tall the factory bump stops are on your Ram, but I can tell you the Timbren springs have an overall height of 5-1/2" (see attached image). Ideally you will maintain 1 to 1-1/2" of clearance between the spring and contact point after installation. I...
    view full answer...
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  • What Is the Correct Timbren Rear Suspension Enhancement System For a 2WD 2019 Ram 1500
    The Timbren Rear Suspension Enhancement System part # TDRTT1500 that you ordered is for service trucks so it would not have been a good choice for your 2019 Ram 1500 because they would have been engaged pretty much all the time making for a rough ride. The Timbren Rear Suspension Enhancement System part # TDR1500DQ is what you want and these will sit about 1"-1-1/2" away from the contact point so they will only engage when you need them.
    view full answer...
    Image 1 for
  • Correct Timbren Rear Suspension Enhancement System for a 2020 Ram 1500
    The correct Timbren Rear Suspension Enhancement System for a 2020 Ram 1500 for everyday towing is part # TDR1500DQ. The Timbren Rear Suspension Enhancement System part # TDRTT1500 is designed for service applications such as using an in-bed camper or flat-bed so the ride would be very rough.
    view full answer...
  • Difference Between TDR1500DQ and TDRTT1500 Timbren Kit for 2013 Ram 1500
    The difference is the weight capacity of each. They both fit the 2013 Ram 1500 like what you have, but the part # TDRTT1500 has a 7k lb capacity and the # TDR1500DQ has a capacity of 8,600 lbs. For what you are doing the lighter capacity will be the way to go. It will give you the support you need but won't be nearly as harsh as the 8.6k kit.
    view full answer...
  • Can 2019 Ram 1500 Big Horn Have Timbren Suspension Kit Installed
    As long as your 2019 Ram 1500 Big Horn does not have the factory air suspension you can install a Timbren kit like the part # TDRTT1500. Your Big Horn model did have air suspension as an option but it was not standard. Only model that had it standard was Limited Elite model.
    view full answer...
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  • Timbren Suspension System That Fits 2020 Ram 1500
    I checked with Timbren just now and for your 2020 Ram 1500 the correct fit is the part # TDR1500DQ. This is a carry over from previous year trucks.
    view full answer...
  • Correct Fit Timbren Rear Suspension Enhancement System for a 2019 Ram 1500
    The correct Timbren Rear Suspension Enhancement System for a 2019 Ram 1500 (Crew and Quad Cab) is part # TDR1500DQ. The other options you see are for different cab types and applications like service trucks. The above Timbrens feature a simple press-in fit for easy and maintenance free support while towing or hauling. They have the highest capacity of any other suspension upgrade so you don't have to worry about maxing them out.
    view full answer...
  • Will Timbren Suspension Enhancement System Fit a 2013 Dodge Ram 1500 with Coil Springs
    The pictures in the instructions and throughout the product page for Timbren springs # TDRTT1500 are generic and not meant to convey the actual vehicle the springs fit on. They will fit your 2013 Dodge Ram if it is a 1500 crew cab with coil springs. However, these springs are meant for service vehicles like dump trucks, fire trucks, and so on. If you do not have a service vehicle use # TDR1500DQ. I have linked a video showing a typical installation on a truck that does have the coil spring...
    view full answer...
  • Difference of Timbren Rear Suspension System # TDRTT1500 and # TDR1500DQ on 2011 Dodge Ram Crew Cab
    The Timbren Rear Suspension Enhancement System, part # TDRTT1500, and part # TDR1500DQ, will fit your 2011 Dodge Ram 1500 Crew Cab 4WD. The # TDRTT1500, system is rated at 7,000-lb capacity and considered a severe service application. It was designed for tow truck, dump truck, and trucks that will use a slide-in camper, and have a weight in the bed a majority of the time. The # TDR1500DQ, system has a 6,000-lb capacity and is designed for somebody that might haul or tow on the weekends....
    view full answer...
  • Do Timbren SES for 2020 Ram 1500 Void Vehicle Warranty
    In a word, no, the warranty of your 2020 Ram 1500 will not be voided with the use of the Timbren Rear Suspension Enhancement System # TDRTT1500 or # TDR1500DQ. You are protected by what is called the Federal Magnuson-Moss Warranty Act. This act says if something breaks on your vehicle and you take it in for warranty repair, the dealer must honor your warranty unless whatever you have added to your vehicle or its installation actually caused the problem in question. The Timbrens will...
    view full answer...

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