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Timbren Suspension Enhancement System - Severe Service - Rear Axle
Timbren

Timbren Suspension Enhancement System - Severe Service - Rear Axle

Part Number: TFRTT350F
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$398.07
Retail:$468.32
You Save: $70.25
Vehicle Suspension

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8,000-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 TFRTT350F can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TFRTT350F

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

8,000-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.


Features:

  • 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 have a smooth, comfortable ride
    • Allows the leaf spring ample movement while cushioning light loads
    • 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: 8,000 lbs
    • Do not exceed the vehicle's weight-carrying capacity
  • Height of bracket sides: 3"
  • Spacer height: 1"
  • Spring length: 3-3/4"
  • Designed to work with a suspension system that is in good working order
  • Limited lifetime warranty - satisfaction guarantee


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.



FRTT350F Timbren SES with Aeon Hollow Rubber Springs - Rear Axle - Severe Service

Installation Details TFRTT350F Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Timbren Suspension Enhancement System - Severe Service - Rear Axle - TFRTT350F

Average Customer Rating:  4.7 out of 5 stars   (6531 Customer Reviews)

8,000-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.

by:

Excellent product works great easy to i nstall.



by:

Delivered in 3 days, installed with just a few hand tools total time took about 20 minutes. Tested immediately with 2 tons of mulch in the bed of my truck. Best I have seen for he money. Awesome!!! Great product.



by:

Great product. Stabilized my loads and rides better.



by:

Very good information and fitment. Fast delivery. One of the better businesses to deal with. Thanks!



by:

Great product and easy to install as per the directions that were included. I would recommend them to anyone in need of this kind of product for your truck.



by:

Seems like it will be a great help with overload conditions. Fast delivery and easy install.



by:

I bought these for a 2020 Ram 2500 because they had great reviews here and at a lot of other places around the internet. They do not fit correctly. On the passenger side, they are almost touching the frame with no load in the bed or on the hitch. The ride is absolutely terrible, very rough and painful. The ONLY time it's tolerable is with my 3000 pound camper in the bed of the truck. I would have returned these, but I waited a few months to install them, so it was too late by the time I realized how bad they were for my application. If you have a truck that is always loaded with a lot of weight, this would be awesome. Otherwise, spend the extra money and get air bags. I will be installing air bags and throwing these in the trash.



by:

Installed this kit on the front of my 2012 FORD F250 4X4 AND they work well so far.



by:

Product reuses factory mounting bolts which when installing on a pickup with more than a few years old plan on buying new.



by:

Great experience, price leader, free shipping and great instructions. I had my new Timbren supports installed in 30 minutes.

Thank you,

Don



by:

Product was great and easy to install. It took about 30 minutes to take the originals out and put in the new one.



by:

Was easy to install however I'm not sure they are totaly seated, ill wedge and hook heavy trailer to seat. Came in a few days totally satisfied.
Sales department,



by:

Great product.



by:

I installed these on my last Ram 1500. Time to install them on our new 1500. This is the easiest solution to help with the squat.



by:

Great customer support. Selected the proper parts ,received promptly, installation was simple



by:

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



by:

Great customer service and easy install ation.



by:

Great product. Great idea and works as it should. Didn't give a 5 star because the mounting bolts were a little on the cheap low quality side. But other than that no complaints



by:

Really good customer service!



by:

The product first arrived in a damaged box with one of the washers missing, but ETrailer did resupply that. The hardest part was finding a shop able (needs the right tools to depress coil springs) and willing (a potential liability issue messing with suspension) to replace it for a reasonable cost. Eventually a local tire shop agreed to. This was for a 2014 Honda Odyssey, especially for pulling a pop-up. Took two camping trips last summer, one before and one after installation, and I have been pleased with the added stiffness in the rear suspension. It made about 1 to 1.5 inch of difference in resting position when fully loaded and towing and has helped smooth out bumps and humps in the road - both when towing and not.



by:

Installed these on a 2002 Tundra last week. They appear well made and ride about two inches below the axle stop. Instructions are straight forward but I would have appreciated a torque value for the attachment bolt. I have not towed with this setup yet.



by:

We put theese on all our trucks they work great if you use your truck to carry heavy payloads or pull trailers .



by:

Really easy to install . Haven’t tried them out yet hooked up to a trailer. I feel like I won’t be disappointed .



by:

Easy installation. However, product has not been tested in a manner appropriate to provide rating.



by:

Just what my truck needed easy to install and not to bad when I got off road either.


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See what our Experts say about this Timbren Vehicle Suspension

  • How Big of a Gap Should the Timbren Severe Service Have? Which Ones are Right for My Truck?
    Hello Hans, I am a little confused because you have a 2012 Ford F-250 in our fitguide, but the drtt3500d which is our part # T94VR is designed for 2010-2013 Ram 2500 and 2010-2025 Ram 3500; the drtt3500e our part # TDRTT3500E is designed for 2014-2025 Ram 2500. When these severe service Timbrens are installed you can have a gap of 1/2 to 1 1/2" but as you can see in the picture I attached of an install we did here there is 0 gap. If your truck really is a 2012 Ford F-250 then you will...
    view full answer...
  • Will Timbren Springs Fit On 2013 Ford F-250 Without The Raised Bump Stop Above The Axle Tube?
    Yes, you can still install the Timbren Springs # TFRTT350F on your 2013 Ford F-250 without the raised stop like you have seen in the images you found. I have included an image below which shows their other Kit # TFR250SDG for your F-250 on a truck without this device so the bump stop will be contacting the axle. Timbren recommends having 1" of clearance between their spring and your axle when unloaded. This will help to prevent the unloaded ride from being severely harsh. You may or may...
    view full answer...
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  • Which Timbren Springs Are Recommended for a 2008 Ford F-250 with In-Bed Camper
    For your 2008 Ford F-250, I recommend using the Timbren Rear Suspension Enhancement System part # TFRTT350F as this kit has a 8,000 lb weight capacity and is specifically designed for trucks with an in-bed camper. These springs will provide the most amount of support for your situation. In addition to added support, the springs will also work to reduce body roll and increase stability. I have attached a review video of the above system for you as well.
    view full answer...
  • Which Weight Rating Timbren Rear Suspension Enhancement Should I use on my 2009 Ford F-250
    It depends on the loads you are putting in your 2009 Ford F-250. The Timbren Suspension Enhancement Systems for F-250 rear axle have the following capacities: 6,000 pounds for part # TFR250SDF and 12,000 pounds for part # TFRTT350F. If the total weight of what is in the bed of the truck and the tongue weight of any trailer used is less than 6,000 pounds, use part # TFR250SDF. If the combined weight of what is in the bed an any trailer tongue weight is more than 6,000 pounds, use part #...
    view full answer...
  • Will Air Bags Work On a 2013 Ford F-350 with Flat Bed
    I do have an option for you but for a constant load like the service body/flat bed has, we recommend the Timbren Rear Suspension Enhancement System part # TFRTT350F which is designed for this exact purpose. It's not adjustable like air bags but the adjustability really doesn't matter for constant loads and these are maintenance free so you don't ever have to worry about them. They will not only support the weight of the bed but also additional gear and trailers.
    view full answer...
  • Recommended Timbren Rear Suspension Enhancement System for a 2015 Ford F-250 with In-Bed Camper
    For your 2015 Ford F-250 Super Duty Diesel with in-bed camper, I recommend the heavy-duty Timbren Rear Suspension Enhancement System part # TFRTT350F. This system was designed by Timbren specifically for vehicle's with an in-bed camper. This system will most importantly reduce sag but will also work to prevent body roll and increase stability while turning. They are very easy to install and do not require any maintenance which is what makes them so popular. I have attached a review video...
    view full answer...
  • Which Timbren Springs Should I Use For A 2016 Ford F-250 Super Cab With 8,000 lb Jayco 5th Wheel
    For your 2016 Ford F-250 Super Duty, the Timbren Rear Suspension Enhancement System that is the best fit for your application is the # TFR250SDG. It has a 8,600 lb capacity that will suit your needs well. The Timbren springs compress as needed for support, and the heavier weight capacity the stiffer the spring. With these style of springs you don't want to over-do the capacity because it will give you a more rigid ride for your truck. When they aren't engaged with a loaded weight, you...
    view full answer...
  • Which Timbren Kit HD or Lighter Duty for 2016 Ford F-350 That Hauls Campers Frequently
    The difference in harshness between the Timbren kits part # TFR350SDF and # TFRTT350F would be very noticeable. Especially when unloaded. Your truck is already going to have a rough ride as that is the nature of 1 ton trucks but the 12k Timbren kit will make for a very harsh ride when unloaded. I really wouldn't recommend that unless the truck is going to be loaded to near it's max capacity most of the time it will be on the road. For what you are looking to do I would go with the lower...
    view full answer...
  • Selection of Timbren Rear Axle Suspension Kit for 2006 Ford F250 Crew Cab Short Bed 4WD
    The Timbren Rear Suspension Enhancement System # TFRTT350F is intended primarily for heavy-duty service vehicles but would work fine for your application. Both this kit and the lower-rated # TFR250SDF are confirmed fits for your 2006 Ford F-250 Crew Cab Short Bed 4WD. For your reference I have linked the instructions for both kits along with a video on the TFR250SDF. Please note that all suspension kits, including these Timbrens, are designed for use with vehicles whose suspension systems...
    view full answer...
  • Recommended Timbren Suspension Enhancement System For 2016 Ford F-250
    The Timbren Rear Suspension Enhancement System I recommend is part # TFR250SDG, and is a confirmed fit for your 2016 F-250. This will help with the handling of the vehicle when under a heavy load such as when you are towing your fifth wheel. This system has an 8,600-lb capacity and They replace the bump stops and do not affect the empty ride of your truck. The Timbrens will not increase the load-carrying capacity of your truck. These are designed to work with a suspension system that is...
    view full answer...
  • Solution for Reducing Harshness In Ride Quality of Timbren Kit TFTTT350F
    Remove the spacer between the jounce spring and the mounting bracket. That will give you more clearance so that the suspension can move a few inches before activating the Timbren.
    view full answer...
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  • Timbren Rear Suspension Enhancement Recommendation for a 2012 Ford F-250 Super Duty 4x4 Long Bed
    Adding the Timbren suspension enhancement springs to your 2012 Ford F-250 Super Duty 4x4 is a great way to help support your camper and other loads that you may carry throughout the year. The peg style casting on your rear axle that you are referring to will withstand the contact of the Timbren suspension systems. Timbren designed their rubber springs to contact that peg and in the instruction manual that I have attached, they state not to remove the peg. The Timbren rear suspension enhancement...
    view full answer...
  • Timbren Rear Suspension Enhancement System Spring Fell Off 2008 Ford F-250
    This is extremely rare and I can only imagine this happening if the springs were incorrectly installed, or were in the wrong location, under an extremely heavy load, or possibly having the wrong system installed. Per the instructions, there should only be a gap between 1/2 to 1-1/2 inches when the vehicle is empty. That gap is eliminated when the vehicle has a load added. The Timbren system is designed to work with a suspension system that is in good working order.
    view full answer...
  • Recommended Timbren Suspension For a 2012 Ford F-350 Converted Into Feed Truck
    Since you will be using the Timbrens on a 2012 Ford F-350 feed truck which will spend most of its time loaded you will want to use the Rear # TFRTT350F springs with the Front # TFF350SDC springs you found. The rear kit is their severe service kit which is designed to provide more stability on trucks which constantly carry very heavy loads. Do understand while this will greatly increase ride stability when loaded it will diminish ride quality when unloaded due to the stiffness of the springs.
    view full answer...
  • Best Rear Suspension Upgrade for 2015 Ford F-250 4x4 With In-Bed Camper Besides Air Bags.
    I recommend using the SumoSprings Rebel Custom Helper Springs # SS96MR hands down! These are my favorite suspension upgrade that have zero maintenance involved like the air bags require. These are designed to increase in stiffness as they are compressed so as far as the unloaded ride quality you will only see an improvement there along with a slight decrease in body roll when cornering. The Timbren's like Rear Suspension Enhancement System part # TFRTT350F are also hassle free but when...
    view full answer...
  • Best Timbren Suspension System For 2008 Ford F-350 For 5th Wheel & Truck Bed Camper
    That's a good question, and between the two systems, the best one for your 2008 Ford F-350 for support while you are towing your 5th wheel as well as when you using a truck camper is the 8,600 lb option: - Timbren Rear Suspension Enhancement System # TFR350SDF The 8,6000 lb capacity of the # TFR350SDF is more than enough for both the pin weight of your 5th wheel as well as your truck camper. More than that though, the reason they are the best is because they are double-convoluted, while...
    view full answer...
  • Which Timbren Helper Spring Set Should I Get For My 2012 Ford F-350 4X4
    I recommend # TFRTT350F for your 2012 Ford F-350 4X4. It has an 8,000 pound weight capacity, which will support the load you have and help with the stability of the ride.
    view full answer...
  • How Much Torque to Install Timbren SES Kit TFRTT350F
    Hey Jim, when installing the Timbren SES kit part # TFRTT350F 33 ft lbs of torque would be the correct amount.
    view full answer...
  • Recommended fifth Wheel Hitch And Under Bed Rails For 2013 Ford Truck With Ride-Rite Air Suspension
    There are a couple solutions to install a fifth wheel hitch on your truck. An option would be to remove the Ride-Rite system and install Timbrens like part # TFRTT350F. The installation of these will not require a bracket with a bolt that runs through the frame rail and interfere with the installation of the # RP30126. Another option, and the one I recommend is to install a B & W Fifth Wheel Hitch like part # BWRVK3500-5W, and the Custom Installation Kit, part # BWGNRK1111-5W. This system...
    view full answer...
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  • Correct Timbrens for a 2001 Ford F-350 Cab and Chassis
    There are two Timbren Rear Suspension Enhancement Systems for a 2001 Ford F-350, part # TFR350SDF for standard models or part # TFRTT350F for service models. If you have a cab and chassis I recommend the latter as they will be better suited for this application.
    view full answer...
  • Recommended Timbren Suspension Kit for 2015 Ford E-350 Motorhome
    For your motorhome that is built around a Ford F-350 cab and extended chassis I suggest a kit designed for severe duty. For your front axle you can use Timbren kit # TFF550SDH which works on both 2WD and 4WD models. This kit installs without drilling and will help stiffen your front suspension through its progressive resistance. For a rear axle kit you can use # TFR350TTCC which also fits both 2WD and 4WD versions. Both install in place of the factory bump stops. The kit you referenced,...
    view full answer...
  • Recommended Suspension Enhancement for 2014 Ford F-350 Super Duty Hauling 16 ft Trailer
    There is a suspension enhancement solution that will work for your 2014 Ford F-350 but the Timbren # TFRTT350F is designed for use with service vehicles such as tow trucks and would not be the best option for you. Instead I highly recommend the Timbren Rear Suspension Enhancement System # TFR350SDF which have an 8,600 lb capacity and will give your truck the support it needs when hauling your water tank and pressure washer skid. This system will not require any drilling and works by becoming...
    view full answer...
  • Timbren Suspension Enhancement Recommendation for 2016 Ford F-250 Towing Fifth Wheel
    I would recommend the Timbren part # TFR250SDG which has the 8,600 lb capacity over the part # TFRTT350F as this kit is designed for severe duty vehicles like tow trucks. The ride quality would be rather harsh. I attached an install video for the # TFR250SDG for you to check out as well. This kit will provide you the support you need without being overly harsh.
    view full answer...
  • Suspension Enhancement for a 2002 Ford F-350 4x4 with a 6 Inch Lift
    You could install the Timbren springs # TFRTT350F on a truck with a lift but they will not be effective because of the extra 6 inches of space. What I recommend are some SuperSprings, # SSA16, which fit around the leaf spring stack so the lift should not be a factor. I have included a link to the installation instructions for you.
    view full answer...


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