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Timbren Suspension Enhancement System - Rear Axle
Timbren

Timbren Suspension Enhancement System - Rear Axle

Part Number: TFR350SDJ
In Stock
$398.07
Retail:$468.32
You Save: $70.25
Vehicle Suspension

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8,600-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use. Great Prices for the best vehicle suspension from Timbren. Timbren Suspension Enhancement System - Rear Axle part number TFR350SDJ can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TFR350SDJ

  • Bump Stops
  • Towing/Load Leveling
  • Timbren
  • Extra Heavy Duty
  • Rear Axle Suspension Enhancement

8,600-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.


Features:

  • Improves suspension, handling, and safety
  • Provides additional support as needed so you always have a smooth, comfortable ride when towing or hauling gear
    • Allows the leaf spring ample movement while cushioning light loads
    • Becomes more rigid as more weight is added for a great performance when you're hauling a heavy load
      • Increases stability
      • Reduces vehicle sag
  • Works independently - side-to-side adjustment
    • Helps compensate for off-center loads
    • Reduces body roll when swerving and turning corners
  • Acts as a shock absorber, taking the brunt of bumps and rough roads
    • Extends the life of your vehicle's suspension
  • Includes 2 Aeon hollow rubber springs, custom-fit brackets, and hardware for simple installation
    • Installs directly onto frame
    • No drilling required


Specs:

  • Load-leveling capacity: 8,600 lbs
    • Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.
  • 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 when loaded. 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 when loaded or towing because the rubber has more travel.



FR350SDJ Timbren SES with Aeon Hollow Rubber Springs - Rear Axle

Installation Details TFR350SDJ Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

3765 reviews
5 Stars
(2991)
4 Stars
(493)
3 Stars
(116)
2 Stars
(73)
1 Star
(92)
8,600-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.

by:

easy to install, works as expected, alot less leaning in wind



by:

Love them! Work great in taking out vibration and back end play when hauling our camper!



by:

Good product, sturdy and easy to instal l.



by:

Great product. Easy installation. Could not ask for more.



by:

Products were great super easy to install. Shipping took longer than expected



by:

Excellent product. Did everything I exp ected.



by:

Awesome easy install and great stability



by:



by:

This product works in the background and does as advertised



by:

Fairly easy install. Timbres makes quality stuff.



by:

Quick and easy way to prevent sagging of the rear end under load, great handling while driving as well.



by:

Only difficult part is getting the first bolt in place. Very straigt forward install.



by:

Had a problem with online catalog which resulted in me ordering wrong part.
Joshua sent me the correct item and a return for the wrong one, in a timely fashion.
Thanks



by:

Really helped on dips in the road and s tability



by:

Greatly helped the roll of the workhorse frame



by:

About 15 minutes to install and made a huge improvement with a loaded bed or trailer hooked on!



by:

Top brand



by:

Easy to install and worked great ! Highly recommend!



by:

These installed very easy to install.
My
truck doesn't wonder all over the road now with a load in it.



by:

Really helps my truck when I am pulling my fifth wheel.



by:

Helps a lot with trailer loads. Would buy again.



by:

Easy install and does what they say its suposed to! Do seem a little stiff, but time will tell as they break in. Stopped my rear end sagging issues with minimal expense, and repair time.



by:

2021 F 150 The brackets that hold the rubber bumpers has a nut that was welded off center on both brackets.

We drilled them out and put 3/8 bolts in with locknut.
Fast shipping and e mail communication takes about an hour to install.



by:

Great for the heavy load. Doesn’t help sway that much.



by:

Best available for KiaI wish I would have known about this product sooner. I have a Kia Sedona and there are only 2 suspension aids available. I previously had the Firestone airbags and don't recommend. The bags and compression fittings leak and installations complicated.

This was the only other option so I gave it a try. Very glad I did. They do exactly what they say they do. The Sedona doesn't dip nearly as much when I put the trailer on. In fact I had to go to my lower rise hitch so it would sit flat. Ride is solid, but not jarring. I don't really know about the reliability as I've only had them about a week, but it's a very simple concept so I can't imagine problems. They are basically oversized flexible bump stops and have no moving pieces. They seem expensive for what they are, BUT installation is MUCH cheaper than the airbags. It cost me just a bit over a hundred bucks to have them installed at a local service chain (Tuffy). They also are very discrete so your warranty likely won't be called into question.


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See what our Experts say about this Timbren Vehicle Suspension

  • How to Determine If a Spacer is Needed When Installing Timbren Springs on 2022 Ford F-350
    If you're wanting to install the Timbren # TFR350SDJ on your 2022 Ford F-350 then you'll want to measure the distance from where your factory bump stops are installed down to the point of contact on the axle. The Timbren # TFR350SDJ are 7-1/2" tall and according to the manufacturer you need to have 1/2" to 1-1/2" of a gap between the rubber spring and the contact point. If you measure from the place where your OEM bump stop sits down 7-1/2" and the gap that is left is between the 1/2" to...
    view full answer...
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  • 2024 Ford F-350 Super Duty Correct Timbren Kit Fitment
    The only Timbren kit that fits your 2024 Ford F-350 Super Duty is the Timbren Suspension Enhancement System # TFR350SDJ rated for 8,600 lbs. Please note these are only designed to help support your OEM suspension, and it won't increase your load carrying capacity.
    view full answer...
  • Recommended Timbren Suspension Enhancement for Ford F-350
    Timbren Suspension Enhancement will definitely help with the rear end sag and help you to have a more stable ride. To get the correct fit for your truck, I need to know the model year. For instance if your Ford F-350 is between 2005 and 2016 then I recommend the Timbren Rear Suspension Enhancement System # TFR350SDF. However, if your truck is a 2017 or 2018, then I recommend # TFR350SDJ. These products work on single rear wheel trucks as well as dually models.
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  • SumoSprings or Timbren on a 2020 Ford F-350? Which is Better for a 5th Wheel Trailer?
    I always recommend SumoSprings over Timbrens for any vehicle that is not being used as a work truck. SumoSprings have two mounting points that only come together when a heavy load is placed on them. Timbrens will affect your daily driving and will give your rear end a bouncy stiff feeling when you are not towing. For your 2020 Ford F-350 you will want the SumoSprings Rebel Custom Helper Springs item # SSR-128-47-2. You will want to confirm your truck has a bump stop perch over the axle....
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  • Which Timbren Kit Fits 2021 Ford F-350 Single Rear Wheel Long Bed
    Hey James, yep the Timbren kit part # TFR350SDJ that you referenced is a confirmed fit for your 2021 Ford F-350 single rear wheel axle long bed.
    view full answer...
  • Are SuperSprings SuperSway or Timbren Springs a Better Option 2023 Ford F-350 Dually Reduce Sag?
    The SuperSprings SuperSway Stops # SS65GR are going to be the better option versus the Timbren # TFR350SDJ on your 2023 Ford F-350 Dually with upper overload springs. The Timbren's are designed to leave a 1" gap between the jounce spring and axle. This means you will get 1" of sag before they even begin to work. The SuperSprings are designed to make contact with the upper overload spring at stock height when unloaded. This will better help to reduce sag and the sway you are experiencing.
    view full answer...
  • Recommended Suspension Enhancement For A 2022 Ford F-350 Dually
    I can certainly point you in the right direction. I agree with you that the 2,800 sumo springs # SSR-127-54 will not be enough for the kind of weight you are pulling with your 2022 Ford F-350. They may help slightly with sagging, but you would be overloading the springs and that is never recommended. A Timbren # TFR350SDJ would be much more appropriate for this application. These are 8,600 lb capacity rubber springs which will absolutely help eliminate sagging, and improve your ride quality...
    view full answer...
  • Best Timbren Suspension Enhancement For 2023 Ford F-350 Towing 5th Wheel Trailer
    There are indeed Timbrens that are confirmed to fit your 2023 Ford F-350 Super Duty to help stabilize and level your truck for towing your 5th wheel trailer. The correct fit for your F-350 is the following: - Timbren Suspension Enhancement System # TFR350SDJ I verified this fit directly with Timbren for you.
    view full answer...
  • Recommended Suspension Enhancement For 2022 Ford F-350 Towing 5th Wheel Trailer
    We can get your 2022 Ford F-350 set up with suspension enhancement to beef up the rear suspension when you're towing your 5th wheel trailer, and for that I recommend Timbrens, with the correct fit for your truck being the following: - Timbren Suspension Enhancement System # TFR350SDJ The # TFR350SDJ will help your F-350's handling when you are towing as they will take the brunt of the added weight, engaging when needed to counteract sag and body roll, helping level your truck, stabilize...
    view full answer...
  • Timbren Rear Axle Suspension Enhancement For a 2023 Ford F-350 Dually 4x4
    Yes, the Timbren Suspension Enhancement System # TFRTT350J will fit your 2023 Ford F-350 Dually Supercab 4x4. This is their severe service kit which is only recommended to be used on vehicles which will always have a lot of additional weight being carried. The Kit # TFR350SDJ is their standard duty kit if you are only occasionally carrying heavy weights.
    view full answer...
  • Recommended Timbren Suspension System for a 2023 Ford F-350 Cab and Chassis
    No, but I have a set that will. For your 2023 Ford F-350 cab and chassis, you will need the Timbren Suspension Enhancement System item # TFR350TTCC. This system has an identical 8,000 lbs capacity to the item # TFR350SDJ you were looking at. The Item # TFR350SDJ you were looking at only fits the regular 2023 Ford F-350 trucks. It won't be compatible with a cab and chassis model.
    view full answer...
  • Best Timbren Suspension Enhancement For 2023 Ford F-350 Super Duty
    There are two Timbren systems for your 2023 Ford F-350, like you said, with the best definitely being the following part number: - Timbren Suspension Enhancement System # TFR350SDJ The reason for that is the # TFR350SDJ is designed for standard pickups while the other kit, part # TFRTT350J, is designed for service vehicles like a salt spreader, for example. The differences is that the # TFR350SDJ is double convoluted, which just means its shape is designed to compress more, giving you...
    view full answer...
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  • Why Would Timbren On One Side of Truck be Compressed and Other Not at All
    The unloaded picture of your Timbren setup installed on your truck is concerning. Does the truck seem to sit level from left to right? Was it ever in an accident by chance? Are any of the suspension components worn out? You really shouldn't see that much compression on one side of the truck with that much gap on the other side unless something with the truck is bad.
    view full answer...
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  • Timbren Rear Suspension Enhancement System Compatible with 2017 Ford F-350 Super Duty
    First of all, thank you for your service. Unfortunately at this time we don't offer a military discount, but we do have free shipping most of the time on orders like this one. To confirm your fit, we have two sets of jounce springs available from Timbren that are confirmed to fit your 2017 Ford F-350 Super Duty. The Timbren Suspension Enhancement System - Rear Axle # TFRTT350J with a weight rating of 8,000 lbs and the # TFR350SDJ rated for 8,600 lbs. These springs will have a slightly...
    view full answer...
  • Recommended Replacement Bump Stops for Slide in Truck Camper on 2022 Ford F-350
    The Timbren # TFRTT350J is a fit for your 2022 Ford F350 4x4, but its 8600 lb capacity would be overkill for your application, in my opinion. You'd have a pretty rough ride with the suspension under load. I believe you'd be happier with the SumoSprings # SSR-128-47-2 with its 5000 lb capacity. The SumoSprings are made of a more pliable material which would provide a better loaded (and unloaded) ride quality, The # SSR-128-47-2 is for vehicles with a bump stop perch over the axle, If you...
    view full answer...
  • Will Adding The Timbren Suspension Enhancement Provide Any Extra Benefit
    Yes, adding the Timbren Suspension Enhancement System - Rear Axle, part # TFR350SDJ, will provide stability to your suspension. It will be a fail safe to keep your 2017 Ford F-350 Super Duty level when you are towing your 5th wheel. Your suspension will not bottom out with the addition of the Timbren Suspension Enhancement. It will not only help while you are towing your 5th wheel, it will help if you ever carry heavy items in your truck bed. However, after speaking with a Timbren rep,...
    view full answer...
  • Height Difference Between Timbren Kits FR250SDJ vs FR350SDJ for 2018 Ford F-350
    The Timbren # TFR250SDJ and the # TFR350SDJ that you referenced use the same bracket so the overall height difference is what you mentioned of 7-9/16 inches for the taller 350 and 6-7/8 for the shorter 250.
    view full answer...
  • Comparing Timbren FR350SDJ and FRTT350J for 2020 Ford F-350
    The correct Timbren Suspension Enhancement System for a 2020 Ford F-350 is part # TFR350SDJ. The part # TFRTT350J is designed for service body applications. The difference between them is height. The service body version is single convoluted and won't compress as much as the regular version which is double convoluted and will compress more. The more compression you get, the better the ride quality.
    view full answer...
  • Dimensions of Timbren Suspension Enhancement Spring for a 2018 Ford F-350
    From the top of the bracket to the bottom of the rubber spring the # TFR350SDJ Timbrens measure about 7-1/2 inches. When installed you ideally want about a 1/2 inch to an inch of space between the Timbren and its contact point. However, to install them you will be removing your bump stop. So make sure you measure where the bump stop mounts.
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  • Comparing the Timbren SES Part TFR350SDJ and Part TFR250SDJ for a Ford F-250/F-250
    The Timbren Suspension Enhancement System part # TFR350SDJ is correct for your 2017 Ford F-350 whereas the Timbren Suspension Enhancement System part # TFR250SDJ is for a 2017-2019 Ford F-250. The brackets on both of these systems are the same so you can use one on the other but the F-250 kit has a 4-1/2" tall spring whereas the F-350 kit has a 5-3/16" tall spring. Therefore, the F-250 kit will not engage as soon as the F-350 kit when used on a F-350. The later engagement will equate to...
    view full answer...
  • What Timbrens do You Recommend for Towing a 5th-Wheel Trailer on My 2022 Ford F-350?
    For the best Timbren rear-axle setup for your 2022 Ford F-350 4x4 for towing a 5th wheel trailer with a 2,800 pound pin weight, I recommend the Timbren Suspension Enhancement System - Rear Axle # TFR350SDJ. The reason why this kit is the best for your truck is because it will provide you with greater load-leveling capacity compared to the 8,000-pound leveling capacity of the # TFRTT350J. The # TFR350SDJ is compatible with your in-bed 5th-wheel hitch. Also, the # TFRTT350J kit is only authorized...
    view full answer...
  • TorkLift StableLoad Vs. Timbren for 2020 Ford F-350 Super Duty
    I talked to some of our guys down in our installation bays and based on the feedback I received, I definitely recommend the Timbren Suspension Enhancement System # TFR350SDJ for your 2020 Ford F-350 Super Duty. The TorkLift StableLoad # TLA7310S work by engaging your factory lower overload springs earlier than they would otherwise, which minimize sway and assist you when hauling heavy loads. However, disengaging this system requires you to get under the truck and use a rachet (not included)...
    view full answer...
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  • Comparing Timbren TFR250SDJ and TFR350SDJ for a Ford F-250/F-350
    The only difference between the Timbren Suspension Enhancement System part # TFR250SDJ which is for a Ford F-250 and the Timbren Suspension Enhancement System part # TFR350SDJ which is for a Ford F-350 is that the latter comes with a 1/2" spacer, the spring and bracket are the same. If you want to go with the former and purchase the spacer separately then you'd need the Timbren 1/2" Spacer for Raised Frame Vehicles part # TA25722-90P00.
    view full answer...
  • Timbren or SumoSprings For 2022 Ford F-350 Towing 5th Wheel
    Thanks for that info, and for your 2022 Ford F-350 Super Duty, the better option between the Timbren and SumoSprings for towing a 5th wheel trailer are the Timbrens, with the correct fit for your truck being the following: - Timbren Suspension Enhancement System # TFR350SDJ The reason I like the Timbrens more than the SumoSprings for towing a 5th wheel trailer is their greater overall support. A 5th wheel trailer puts quite a bit of load on the back of the truck, more than a bumper-pull...
    view full answer...


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Info for this part was:

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