Product Experts Available Now!
Call 1-800-940-8924
Timbren Suspension Enhancement System - Rear Axle
(7316 reviews)
Price: $398.07
In Stock
We'll connect you with nearby partnered installers who know this exact setup.
Timbren Suspension Enhancement System - Rear Axle
In Stock
$398.07
Retail:$468.32
You Save: $70.25
Will this fit?
To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
We'll connect you with nearby partnered installers who know this exact setup.
- All Info
- Reviews (7316)
- Q & A (0)
- Photos
- Used (1)
Timbren Vehicle Suspension
Highlights
- Custom Fit for Your Vehicle: Mounts to existing attachment points
- 8,600-lb Load Support: Keeps your truck level and stable when towing or hauling heavy gear.
- No Maintenance Needed: Rubber springs need no air lines or adjustments—just install and go.
- Smoother, Safer Ride: Absorbs road shock and limits bounce, sway, and roll on rough roads.
- Handles Off-Center Loads: Each spring works independently to correct uneven cargo weight.
- Simple Bolt-On Install: Mounts to the frame with included brackets—no drilling required.
Features to know about
Stay Level Under Heavy Loads: 8,600-lb Suspension Support
Heavy trailers and bed loads can make the rear of your truck squat and your steering feel light. The Timbren Suspension Enhancement System adds up to 8,600 lbs of load-leveling capacity to keep your truck level when you’re towing or hauling. The hollow rubber springs mount above the rear axle and step in only when the weight demands it, holding the back end steady so your braking, steering, and headlight aim stay right where they should.
Smooth Out the Ride: Progressive Hollow Rubber Springs
Rough roads and jobsite bumps don’t have to beat up your suspension. These Aeon hollow rubber springs compress in stages—soft at first for small bumps, then firmer as the load increases. That progressive action absorbs road shock and cushions impact while protecting your factory leaf springs from bottoming out. The result is a smoother, more controlled ride no matter how much gear you’re carrying.
Stay Steady in Crosswinds and Turns: Independent Spring Action
When a heavy load shifts or a strong gust hits, these springs work independently on each side to keep the truck planted. That side-to-side action helps control sway and body roll during cornering or lane changes. The extra stability keeps both truck and trailer tracking straight even when the road throws surprises your way.
Install It Once and Forget It: Simple, No-Drill Mounting
Adding serious rear support doesn’t have to mean an all-day install. This kit bolts directly to the frame using custom brackets—no drilling required. Each set includes two hollow rubber springs, brackets, and mounting hardware for a quick setup that fits cleanly above the axle. Once installed, there’s nothing to adjust or maintain; the springs automatically engage when weight is applied and stay quiet when empty.
Built to Last Through Years of Hauling
Timbren’s heavy-duty rubber construction is made for trucks that work hard every day. The material resists wear, stands up to constant load cycles, and won’t leak or deflate over time. Backed by a lifetime warranty and satisfaction guarantee, this is a one-time upgrade that keeps your rig level, stable, and ready for the next haul.
Specs
HIGHLIGHTS
- Improved ride quality: Helps eliminate sag and sway when towing or hauling heavy loads.
- Progressive spring rate: Provides a smooth ride under light loads and firm support under heavy loads.
- Easy installation: Replaces factory bump stops with no drilling required.
- Durable construction: Made from high-quality Aeon rubber for long-lasting performance.
Weight and Capacity
- Load-leveling capacity: 8,600 lbs
Warranty
- Lifetime warranty
- Satisfaction guarantee
Note
Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer’s recommended weight limit.
FR350SDJ Timbren SES with Aeon Hollow Rubber Springs - Rear Axle
Item # TFR350SDJ
Installation Details
This Product Fits The Following Vehicles
- 2017 - 2027 Ford F-350 Super Duty 2 Wheel Drive
- 2017 - 2027 Ford F-350 Super Duty 4 Wheel Drive
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
- Arrived Damaged
- Product did not meet expectations
- Wrong item was ordered
Ratings & Reviews
4.7
7316 reviews
by:
Taylor
08/27/2026
1.5" gap... it came with 1 spacer for each side. if i buy the spacer kit, what size are they ? i have a 2026 f350.
by:
Jon
09/15/2026
Changing the stock bump stops out for the Timbrens was one of the best things that I've done. I don't notice any difference in the ride with no load, but the whole towing experience is night and day. It went from a roller coaster ride to smooth and stable. It'll be a lot easier on both the truck and the trailer and I just wish I'd don't it sooner. Installation was a snap, but I do recommend jacking the truck up some because it really improves your access.
by:
John
05/06/2025
Ford
F-350 Super Duty
I installed these on three different trucks in a year, a 24 F350 CCLB Gas SRW to use with a smaller 9.6 Northern Lite truck camper, but decided I wanted to step up to a DRW, as I bought Northern Lite 10-2 instead. I traded that SRW and put these on a new 24 F350 diesel dually. Took that truck and 4000lb camper coast to coast and back. This year I traded that 24 F350 on a 25 F450. The Timbrens needed a 1" spacer for the F450, as the spring blocks are different. I called Timbren, and they sent me the spacers and longer bolts free of charge. Three trips so far this year with the truck camper on the F450. Couldn't be happier with the Timbrens. They have about 3/4" space when not loaded, so there is free spring movement, and they help with sway and level when loaded. I also added overload spring blocks of my own making, similar to the ones Timbrens sells.
John
5/7/2026
A year later, the Timbrens are still on my F450. A coast to coast trip in July and several other camping trips carrying our Northern Lite 10-2. Couldnt be happier with my set up. If youre looking at Trucks, I recommend the F450. Bigger brakes and commercial tires. The turn radius alone will sell you
James D.
5/7/2026
@John Sounds like that’s been a solid setup, thanks for the update!
by:
Issac
09/23/2026
2015
Ford
F-350 Super Duty
I put these on a 2025 F350 dually. I pull a few trailers the heaviest being a 13 k bumper pull toy hauler. Holding up great. What I like most about the timbrens is not having to adjust air pressure in bags I had on my other truck. That and installing took 15 minutes
by:
Jeffrey
05/13/2026
2019
Ford
F-350 Super Duty
These are a fantastic alternative to an airbag system to reduce rear axel squat. I have them on my 2023 F350 SRW 7.3L gas short bed truck and tow a 19,000 GVWR Momentum toy hauler with a pin weight of about 3300 lbs +\- (hitch is goosebox with offset ball). I have very minimal squat with these, and the ride is very smooth. When not towing and with an empty bed the ride is a little stiffer/bumpier, but I don’t find it bothersome. Overall, I find them a great investment that took 10 min max to install and require no maintenance. Of note, I also had them when we had a 38’ bumper pull travel trailer with the same impressive results.
by:
Brian
05/24/2025
I haul a 42 foot 5th wheel RV and these on my truck and they have helped quite a lot with the dolphining bounce on some road ways. I'm pretty happy with them and would recommend them.
Brian
5/25/2026
Its been very helpful with the bouncing hauling my 5th wheel camper. The worst was the dolphining affect at bridge abutments. It hasnt totally eliminated it but has helped considerably. Short of an airbag system, I would recommend these.
by:
Nick
03/30/2025
Shipped fast, took about 10 minutes to install, and 20 minutes to go the parts store to buy a 15mm deep well that was missing from my tools lol. Haven't had it under much load yet, but so far, the little bit I have has been good. Will be testing later this week with a skid loader trailer and forklift.
Gwendolyn Y.
3/31/2025
I'd love to hear how everything goes when you tow the skid and forklift, Nick!
Gwendolyn Y.
4/2/2025
@Nick Thats awesome! Definitely worth the upgrade then :)
by:
Nancy
02/22/2026
When my four year old air bags failed I had to find a product that was going to be more reliable. The Timbren SES fit the bill. Very easy to install and no fiddling with the right air pressure for the load. Pulled our fifth wheel yesterday and was very happy with the way unit handled under load. My personal experience has been very positive.
Lazer S.
2/24/2026
Glad to hear they are working well for you, Nancy! How are they when you aren't towing? We do hear they can be on the harsh side when hitting large potholes and bumps.
by:
Andrew
06/10/2018
2018
Ford
F-350 Super Duty
Product was easy to install, 1/2 hr taking my time. Used a open end wrench and floor jack. My 2018 F350 Super Duty Super Cab 4wd no longer plunges over bumps, it has lost all its rear end sway on turning, carries my load much smoother ( loaded all the time ). Even with the load I always carry, the vehicle sits 1” higher in the rear. Prior to the install I was constantly hitting the rubber stops on my factory overload springs.
Andrew
6/10/2019
Excellent! I have since purchased another set from you for a 2019 F350 diesel. These things are just the ticket! The ride and handling is so much better!
by:
David S.
03/05/2025
Ford
F-350 Super Duty
I purchased these to install on my 2024 Ford F350 SRW. They did not line up with the center of the saddle and would bulge out when under load. I contacted Timbren customer service and they provided me with a set off offset adapters.
Brooke M.
3/6/2025
Wow! Thank you for sending in the before and after pics. The offset adapters really made a bid difference!
by:
Tracy
03/20/2026
Ram
2500
Good stops rear end sag and sway only thing is the bump stop end on axle is rounded they should make the Timbren rounded for the new Ford F350 other than that it works fine and does exactly what my old set that I had on my 2006Dodgeram 2500 did for me good stuff Aloha
by:
Paul
06/21/2023
2022
Ford
F-350 Super Duty
Took about 45 minutes to install. But that was 2 trips into the house cause my deep drive sockets were buried. F-350 gasser with 8’ box, Fiberglas cap, 200lb wooden storage drawers and estimated 400lbs in tools. I tow a 14k bumper pull dump that squats the truck. I installed the spacer with the timbrens and it sits on the original axle stop. Ride quality is unknown as I haven’t driven it yet.
Paul
6/22/2024
Still work great. Also tow a 24’ bumper pull camper. Timbrens definitely help. Selling this truck. I pulled the Timbrens and will be giving them to a friend that tows. I plan to get a set for the next truck. No complaints on function or ride quality.
by:
Dennis
03/15/2026
2024
Ford
F-350 Super Duty
Did not change the ride when empty but, really helped when loaded. I pull a 40'gooseneck behind my F350, made a world of difference. Before the ride was so bad, I was going to update to an air ride trailer. Now it's good, it's still a truck and trailer. Easy to install, 30 minutes.
by:
Michael
04/28/2026
2026
Ford
F-350 Super Duty
Bought a new F350 with plenty of weight capacity. Hooked up our 3 horse gooseneck, and had so much sag and front end lift that my wife refused to even consider driving it any distance. Put these on and she's happy now. Took all of 30 minutes to install.
by:
Pam
09/12/2026
Good customer service with phone calls. Thank you
by:
Jeff
02/06/2025
For the money it does a good job. My 5th Wheel is level and travels down the road quite well.
Jeff
2/7/2026
I really like the Timbren product. It keeps our 38’ Fifth Wheel level and tracks well going down the highway. Very pleased.
by:
Mike
08/11/2026
2024
Ford
F-350 Super Duty
Excellent ride with and without trailer . much more stable
by:
John
04/06/2026
2020
Ford
F-350 Super Duty
Completely satisfied!! I have a 2020 F350 and haul a 41’ 5th wheel. I have noticed a bit of sag and decided on these as a quick fi based on others reviews. I installed them with the additional included puck and immediately noticed a huge difference towing. When I hit an unexpected bump it just glides over super smooth. Can’t recommend these enough.
by:
Charles
11/26/2024
Ford
F-350 Super Duty
Haven’t tested them with a load yet, so no opinion on performance yet.
Took more than the 15min I’ve seen posted in places. Not difficult, just hard to get to under my ‘22 F350 DRW. After opening the box, I noted that one of the rubber springs had a flat washer inside (which seems like a good idea to distribute force over a larger area). The other rubber springs did not have a flat washer installed in it (nor was it anywhere in the box). I had one in my garage so it didn’t stop my install, but for the price on these, I expect all the parts to be there.
Taking my first trip with them installed next week, so will see how they perform.
Took more than the 15min I’ve seen posted in places. Not difficult, just hard to get to under my ‘22 F350 DRW. After opening the box, I noted that one of the rubber springs had a flat washer inside (which seems like a good idea to distribute force over a larger area). The other rubber springs did not have a flat washer installed in it (nor was it anywhere in the box). I had one in my garage so it didn’t stop my install, but for the price on these, I expect all the parts to be there.
Taking my first trip with them installed next week, so will see how they perform.
by:
Jason
07/15/2020
Great product! I had some body sway, and a little sag when loaded heavy in my F350. I have a steel flat bed so my pickups not empty when empty, these fixed my issue of it being squishy till the factory overloads kicked in.
Made the ride solid and firm, exactly what I was looking for. Makes corners great again for a heavy duty pickup, only thing a person may want to consider is if you have a heavy bed or loaded with tools, you’ll have to pick up the rear end to unload the springs enough to slip the timbren in.
Cant wait to get hooked up to the Rv and our dump trailer and see how much better it trailers, especially since it exceeded my expectations empty.
Made the ride solid and firm, exactly what I was looking for. Makes corners great again for a heavy duty pickup, only thing a person may want to consider is if you have a heavy bed or loaded with tools, you’ll have to pick up the rear end to unload the springs enough to slip the timbren in.
Cant wait to get hooked up to the Rv and our dump trailer and see how much better it trailers, especially since it exceeded my expectations empty.
by:
Walt
11/28/2025
Volvo
Cross Country
I called etrailer, Madison answered the phone took my order. I was leaving for a cross country trip in 5 days, etrailer shipped them right away. I had them in time for my trip, I installed them with no issue, left out on my trip with a 24' enclosed trailer loaded full. Timbren stabilized the truck and reduced sag on my F-350. Rough roads on I-40 we're terrible, but Timbren reduced the shock of the rough roads. I am very happy with the Timbren Suspension Enhancment system.
by:
Dustin
08/07/2023
These keep my truck level with my slide in camper on board. It no longer rests on the helper springs. I have gained over 2” of height on the bed. Super easy to install. They also are noticeable on corners. Not nearly as much lean.
by:
Chris T
05/29/2020
2019
Ford
F-350 Super Duty
So easy to install on 2019 F350 SD Dually. just lift the back an inch by the hitch and can work right over the tires. no need to get dirty under the truck. I only drop 1.5 inches with my current fifth wheel, so these will just come into service when i load then family. Installed in less than 30 minutes.
by:
Keith
06/20/2026
The merchandise package was missing parts and looks like they just throw things in there
by:
Nate
08/29/2026
2022
Ford
F-350 Super Duty
Came quickly, install went well, and ride is much better. Thanks
25
7316
true
Show More Reviews
See what our Experts say about this Timbren Vehicle Suspension
- Will Adding Timbrens to My Ford F-350 Super Duty Help with the Chucking When Towing 5th Wheel?Hello Bruce, Great question. The correct Timbren kit for your 2022 Ford F-350 Super Duty is the Timbren Suspension Enhancement System - Rear Axle # TFR350SDJ. This fits both 2WD and 4WD models. Timbrens replace your factory bump stops with a progressive rubber spring. They engage as the suspension compresses under load and can help reduce rear-end squat when towing. If your truck is squatting and the trailer is riding nose-high, that can sometimes contribute to ride issues. In that...
view full answer... - Will Timbren Suspension Enhancement Affect Onboard Scales System On 2026 Ford F-350?Hello John, thanks for reaching out, and congrats on the new truck. Yes, the Timbren Suspension Enhancement System # TFR350SDJ will affect the onboard scales on your 2026 Ford F350. The system operates by reading how level the back of your truck is. It will still work for lighter loads but anything that makes you sag to the point the Timbrens engage won't be accurate. Do you use the onboard scales a lot. What kind of trailer will you be towing?
view full answer... - Spacer Kit Recommendation for Timbren Kit that Fits 2026 Ford F-350 TremorHey Dave, I checked with Timbren and the spacers you'd need with the Timbren part # TFR350SDJ that fits your truck are two of the part # TA25722-90P00 and two of the part # A25723-90AH00 this will give you the correct amount of spacers for the Tremor version of your 2026 Ford F-350. Are you planning on doing some towing?
view full answer... - Timbren Kit Recommendation for 2023 Ford F-350 Towing 5th WheelHey Gary, welcome back! For your 2023 Ford F-350 the correct Timbren kit is the part # TFR350SDJ that you referenced. This will provide you all the support you are looking for but won't be as harsh as the severe service version which would be quite a bit more harsh. What camper are you towing?
view full answer... - Which Timbren Rear Axle Jounce Springs Will Fit The 2026 F350 Dually Super Duty?Hey Alexis! There are two Timbren kits that work with your 2026 Ford F350 Super Duty, and both fit the dually and single wheel models, so no issues there. -Timbren Suspension Enhancement System - Rear Axle # TFR350SDJ -Timbren Suspension Enhancement System - Severe Service - Rear Axle # TFRTT350J The only difference between these is that the second one is the severe service model, which is a lot stiffer and rated for more weight. The tradeoff is that it will give the unloaded truck...
view full answer... - 2024 Ford F-350 Super Duty Correct Timbren Kit FitmentThe 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... - How to Determine If a Spacer is Needed When Installing Timbren Springs on 2022 Ford F-350If 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...
- Recommended Timbren Suspension Enhancement for Ford F-350Timbren 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.
view full answer... - Can Timbren Kit for 2017 Ford F-350 be Work with Rough Country 4 inch LiftHey Scott, yes the Timbren kit part # TFR350SDJ that you referenced can be used on your 2017 Ford F-350 with a 4 inch lift kit but you'll need to also use the spacers part # A25723-90AH00. You'll need a total of 8 of the spacers plus you'll need to source longer hardware as well. Basically you'll need to take the bolts that come with the kit to a hardware store and get ones that are 4 inches longer in same size.
view full answer... - 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....
view full answer... - Are Timbrens and Torklift Stable Loads Compatible on a 2020 Ford F-350? Yes, they will! The TorkLift StableLoad item # TL89CR that fits your F-350 is compatible with Timbren systems. The Timbren's mount over your axle just inside the leaf springs. For your 2020 Ford F-350 dually, I recommend the Timbren Suspension Enhancement System - Rear Axle item # TFR350SDJ. These have a 8,600 lbs capacity and come with custom fit brackets that bolt directly to your truck. I have linked an installation video below so you can see how to get them set up. If you have any...
view full answer... - Will Timbren TFR350SDJ Fit 2026 Ford F350 4x4 SRW? Hello David, thanks for reaching out. Yes, the Timbren Suspension Enhancement System - Rear Axle # TFR350SDJ will indeed fit the 2026 Ford F350 4x4. Both our site and the Timbren site confirm this. It looks like you were looking at the # TFR250SDJ which are for an F250, so that is why it says they will not fit your F350. I can assure you the # TFR350SDJ will fit your truck and work great though.
view full answer... - Is The etrailer TFR350SDJ The Same As The Timbren FR350SDJ?Hi Greg! The # TFR350SDJ is just our part number for the Timbren Suspension Enhancement System - Rear Axle FR350SDJ. They are the exact same thing. I see you were looking at this for a 2025 Ford F-350 and I wanted to confirm that it will fit perfectly! Out of curiosity, what are you loading in your bed? This is a pretty heavy duty jounce and is typically used with in bed campers and stuff like that.
view full answer... - Timbren Kit Recommendation for 2024 Ford F-350 with Welder RigHey Brian, for a heavy setup like what you have I would go with the Timbren kit part # TFR350SDJ as this will provide you the most support and these are super durable so you wouldn't need to worry about sag. How fast are you going through air bag kits?
view full answer... - Which Timbren Kit Fits 2021 Ford F-350 Single Rear Wheel Long BedHey 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... - Recommended Lock for a Gen-Y 5th Wheel Hitch Hey Randy congrats on the new trailer. We do not have any coupler locks that fit a Gen-Y Gooseneck Pin Box like item # GY38FR. My only solution to secure your trailer is to use the Rack'Em Lock'em Magnum Wheel Lock item # RA-25. This lock fits 12" - 20" wheels and the rubber-coated arms will not scratch your wheels. I have linked a review video below so you can see the features of this lock demonstrated. What kind of trailer did you get?
view full answer... - Best Timbren Suspension Enhancement For 2023 Ford F-350 Super DutyThere 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...
- 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... - TorkLift StableLoad Vs. Timbren for 2020 Ford F-350 Super DutyI 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...
- Comparing Timbren TFR250SDJ and TFR350SDJ for a Ford F-250/F-350The 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 Rear Suspension Enhancement System Compatible with 2017 Ford F-350 Super DutyFirst 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... - Comparing Timbren FR350SDJ and FRTT350J for 2020 Ford F-350The 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... - Why Would Timbren On One Side of Truck be Compressed and Other Not at AllThe 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...
- Height Difference Between Timbren Kits FR250SDJ vs FR350SDJ for 2018 Ford F-350The 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...
Do you have a question about this Vehicle Suspension?
Used Items Available
Info for this part was:
Edited by:
Leah B
Expert Research:
Mike L
Expert Research:
Jameson C
Video Edited:
Jacob T
Video Edited:
Dustin K
Video Edited:
Chris R
Installed by:
Cole B
Updated by:
Mary K
Updated by:
Wilson B
Updated by:
Michael B
Updated by:
Carrie F
Updated by:
Lincoln B
Video by:
Jonathan Y
Written by:
Anna W
Test Fit:
Robert C
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Kate F.
8/31/2026
With the Timbrens, you will want to have a 1/2" to 1-1/2" gap when the vehicle is unloaded. They are only designed to engage when the suspension is under load and you need the additional support. If you want to reduce that gap so the Timbrens engage sooner, you can add the 1/2" Spacer # TA25722-90P00 or the 1" Spacer # A25723-90AH00.