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Timbren Suspension Enhancement System - Severe Service - Rear Axle
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Timbren

Timbren Suspension Enhancement System - Severe Service - Rear Axle

Part Number: TFRTT350E
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$398.07
Retail:$468.32
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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 TFRTT350E can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TFRTT350E

  • 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
  • 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.



FRTT350E Timbren SES with Aeon Hollow Rubber Springs - Rear Axle - Severe Service

Installation Details TFRTT350E Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Timbren Suspension Enhancement System - Severe Service - Rear Axle - TFRTT350E

Average Customer Rating:  4.7 out of 5 stars   (6423 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:
2002 Ford F-250 Super Duty

The Timbren rear suspension enhancement system helped with the truck swaying side to side when the slide in camper is on the truck.
The photos show right and left rear with Timbren’s installed (2 photos), with slide in camper on the truck (2 photos) and when the camper was removed (2photos).



by:

Pretty unhappy on this one. Placed the order on the 14th with a 17th delivery date. A confirmation email comes back that it's been shipped but delivery will be on the 20th. I have to delay my trip waiting for this to arrive—last piece of the puzzle. And I get an empty box. I was thinking of canceling when I got the confirmation, should have gone with my initial response. I called and was told a replacement isn't available until mid-March. That's not acceptable. Canceled to order and now have to order elsewhere,
D



by:

I installed the timbrens on a F350 dually with a slide in camper. The ride was extremely rough couldn't keep the cabinet doors in the camper shut, i think they are a good product but just way to stiff a ride for our liking replace dwith airbags and compressor.

Sierra K. profile picture
Etrailer Expert

Sierra K.

1/24/2022

I contacted the manufacturer about this and they believe it is odd and it sounds like the gap between their product and the axle may have the wrong gap. If you would like to look into it further, I will email you information on how to contact Timbren.



by:

It fit perfect, I had to get a special order due to a small lift on my truck suspension but there help at timbren got me the special order number and allowed me to order through etrailer properly, where several other companies couldn't seem to get the job done because of the special order item number, so" hats off to the sales associate at etrailer". It definitely keeps my truck bed from squatting with my UTV up top and my trailer on, and very little sway on corners. Seems to ride the same with no load at all. I don't know if airbags would have been better, but for me this did what I wanted with much less work and expense. I have a F-350 S.B. (single wheel) carrying a 1100 lb. UTV atop my diamondback cover pulling a 22' trailer with 350 tongue weight.



by:

5 stars. Easy to install and made a big difference when pulling a 9k pound travel trailer. I would recommend it to anyone pulling a trailer. Kept it from sagging and level.

02 F. profile picture

02 F.

9/9/2020

Awesome and still working



by:

The Timbren Suspension system did keep my pickup level when towing my 5th wheel trailer.



by:
Ford F-350 Super Duty

I was on the fence about air bags or the bump stops for my slide in camper on my f350 after lots of reviews I decided to go with the bump stops and couldn’t be happier my truck handles awesome going down the road.



by:

Great product! I've used Timbres suspension enhancement products on another vehicle and they work great. No airbags to worry about and super easy to install. Etrailer is always a pleasure to work with and gets things shipped quickly.



by:

Product fit and customer service was gr eat



by:
2003 Ford F-250 and F-350 Super Duty

All products were great.



by:



by:

Easy install took about 20 minutes on my 2017 Ram 3500 SRW. Had about 1/2 inch clearance as recommended. Loaded up my 5th wheel (2350 hitch weight) and about 200 lbs of gear in the bed. Just got back from a 800 mile camping trip through mountains of TN. You can really feel the difference around those sharp corners and uneven surfaces. The truck felt firm and controlled not hard and jarring as some have mentioned. Going over those overpasses with the wonderfully smooth (Not) joists was greatly improved. The truck would squat and rebound again, with a firm controlled response. Driving without a load felt the same as before without them. I would highly recommend these! Ordering from etrailer continues to be my go to option!



by:

The product came very fast. I already installed it the same day on my 2009 Dodge Ram pickup. It looks like it should do a fantastic job. I'll know better when I hitch up my travel trailer.



by:

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.



by:

I bought the timbren SES 121474110. I am not really satisfied with how these helped my trucks towing stance. The truck tows the same. I carry an in bed tank with 50 gallons of fuel in addition to the 35 gallon fuel tank from factory. The truck rides the timbrens the whole time. Thats okay, my problem is that the truck squats the same amount with these when I hook up my car trailer. The truck still goes straight down to the load leaves (pretty heavily squatted) the same as before. Did I get a light duty version? dont feel these meet the 6,000 Ibs capaticy as advertized. I think I should have gotten air bags. The product was well made. so they still get 2 stars. Just not what I thought it should have been.



by:

I know it will be lovely when loaded or the trailer on. However,it rides like a wagon empty with brand new premium shocks and struts empty. Thud thud thud. You really cannot feel the shocks or suspension. Found exact same item plentiful for 60 bucks on eBay after I bought these for 250. I may cut these in half or put air bag on. I do not like the ride empty. No hard feelings. It is a good product maybe just not for me.



by:

Installation was a breeze, removed old bump stops installed Timbrens in about 30 minutes. Haven’t put a load on them yet so I’ll update later. Installed on a 2008 Silverado 2500HD..



by:

Was able to install these with a 15mm flex head ratchet wrench and lifted the rear of the truck to make it easier. 30 minutes to take off 4 nuts and put em back on. 2 minutes assembling the timbrens with the added spacer. I have a f350 with a salter and plow. Loaded with salt the lights shoot up and in the snow ?? it’s like hitting hyper drive and you’re blinded. These helped big time. Very happy so far.



by:

Out of the box fit !!
Only issue I had
was keeping the wedge from moving during installation



by:

The pro: The longer, heavier bump stops worked great when hauling my mustang home from Chicago. The truck stayed level and handled great.
The con: I had to remove the bump stops for everyday use. They limited my suspension travel causing a stiffer ride.



by:

I am so glad I bought these for my truck. I was able to install them myself using a jack and jackstands. The ride is bit rougher now; but the suspension is totally awesome compared to before. I am able to haul a bit more weight when needed.



by:

very good product ,received just in time and fit perfectly on my GMC savana 2000 .Be sure to clean the two receptacle thats help.
très bon produit , reçu dans les délais et s'ajuste parfaitement . Assurez-vous de nettoyer le receptacle cela facilite l'installation.



by:

After successfully using air shocks with on board compressor on our 2001 F250 for years, I almost automatically put the same setup on our new 2022 F250. We tow an 11k lbs travel trailer. Then I read reviews on Timbren Suspension Solution & thought, worse case I’ll end up with both solutions. After spending 20 minutes installing Timbren and towing the trailer a few miles, it became obvious I didn’t need air shocks, or anything else. The truck & trailer drive as one. Our rig is level and rides great. When the trailer is unhitched, the Timbren’s aren’t engaged - just a normal F250 ride.



by:

The Timbren rear suspension bump stops are the best by far. I installed this unit on a 3rd gen Toyota Tacoma which became an essential item for safety towing purposes.

The main reason for purchasing this product was for aided support for towing. This is essential for those who tow boats, tear drop trailers or medium sized campers.

The stock bump stops are relatively small in size which is standard for other vehicle manufacturers however Timbren's bump stop are made with such high quality material and craftsmanship.

This also helps in preventing in stressing the front suspension from becoming raised which can affect your steering when your towing. The Timbren bump stops also helps in preventing your rear suspension from the "sagging effect" which can cause stress to your tires.

I recommend that when you install the bumps stops, check the lugs every quarter or depending on frequent you tow, to include tightening the lugs with a torque wrench to ensure it's torue specification(s).

This product has given me peace of mind when traveling long distances and when camping off the grid. Timbren also has good customer support service however etrailer has paramount customer service as well.



by:

I’d seen similar products rated in the 4,000 lb ratings but I went with these. I’m not a mechanic but I removed the factory bump stops and installed both these in 30 minutes or less. I used my rolling jack and lifted from the drop hitch and easily removed the old ones and soapy water and 1/4 twist and these were on. Placed a block of wood in the space between these coils and lowered the jacks then pressed it with my tractor to confirm full engagement. I carry a lot of tools on a 2020 Chevy 2500 I do feel a bit of butt bounce on large bumps but other than that I’m very pleased.


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See what our Experts say about this Timbren Vehicle Suspension

  • Timbren Suspension Enhancement Fit For 1997 Ford F-250HD 4WD
    The difference is fit, as three of the parts you mentioned are for F-350 cab & chassis and not a fit for the 1997 Ford F-250HD 4WD. The parts that fit that truck are the following: - Front: Timbren Front Suspension Enhancement System # TFF2504A - Rear: Timbren Rear Suspension Enhancement System # TFR250SDE OR - Rear: Timbren Suspension Enhancement System - Severe Service - Rear Axle # TFRTT350E The difference between the two rear kits is their application; the # TFR250SDE is for occasional...
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  • Suspension Enhancement Recommendations for a Fleet of 2002 Ford F-350 Ambulances
    Air springs are a good solution if the load in the back is frequently changing side to side. When it remains static a better solution would be to go with a non-air system. The load in the back of an ambulance can change depending on the personnel inside, the equipment, and the patient. But there is also not as much room to move the variables around in the back. Either type of system would work for you. For your ambulances, and for an air system, I recommend the Firestone system, # F2550....
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  • Suspension Enhancement Recommendation for a 1999 Ford F-250 V10 Supercab 8 ft Bed
    The Firestone Air Spring kit part # F2550 will not fit the Supercab V10 models with an 8 foot bed due to interference from the frame design of the truck. Your best option would be a jounce style spring enhancement like the Timbren part # TFRTT350E which has been confirmed as a fit for your truck. The great thing about these kits is that they do not require any air line running or maintaining of air pressure. You install them and they are there when you need them and not when you don't.
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  • Does Spacer Come with Timbren Suspension Kit for 2003 Ford F-250
    Yes, the spacer is included with the Timbren kit part # TRF250SDE and this is a confirmed fit for your 2003 Ford F-250. We have an 8k kit too with the part # TFRTT350E but there isn't a way to upgrade one from the other though. I would go with the lighter duty kit since the ride quality won't be as harsh.
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  • Best Suspension Enhancement Recommendatio for 2004 Ford F-350 Dually with Camper Shell
    The best suspension enhancement kit for your 2004 Ford F-350 dually for your application is the RoadActive Suspension kit part # RAS3611-HD as it gives you the support you are wanting, is easy to install, and unlike other options (including two you mentioned) that hurt the ride quality this actually improves the ride quality and stability.
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  • How To Prevent Vehicle Sag and Sway on a 2002 Ford F-250 with In-Bed Camper
    The Timbren Rear Suspension Enhancement System part # TFRTT350E is exactly what you will want to use on your 2002 Ford F-250 to haul your in-bed camper as they are designed for exactly this purpose and will take a lot of the sway out due to the higher center point as well as sag. There really is not a better system on the market for use with an in-bed camper. However, they will not increase the payload capacity of your vehicle nor will any aftermarket suspension enhancement system claim...
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  • Can Timbren Kit Install on 2001 Ford F-350 with Lift Kit
    Timbren kits like the part # TFR350SDE and the # TFRTT350E both can be used on vehicles with lift kits installed. Timbren makes spacers that can be added to the kits to take up the extra room created by the lifts. We have 1 inch spacers like the part # A25723-90AH00 and half inch part # TA25722-90P00. Basically you would need to go with a spacer combo that matches the amount of lift the kit you install provides.
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  • Does Timbren Severe Service Rear Suspension Kit # TFRTT350E Fit 2000 Ford F-250 Short Bed
    Yes, the Timbren Severe Service Rear Suspension Kit part # TFRTT350E is a confirmed fit for your 2000 Ford F-250 Super Duty short bed. This does not require the bumper to be left installed to function or install properly.
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  • Timbren Rear Suspension Enhancement System Instructions for 1997 Ford F-250- F-350 Heavy Duty
    I am sorry to hear you are having trouble installing the Timbren Rear Suspension Enhancement System item # TFRTT350E on your 1997 F-250 or F-350 Ford Heavy Duty. That system is a confirmed fit for your truck. Unless there are after market suspension components in the way it should fit. I have linked a couple pictures from the installation instructions. It looks like there is an existing bump stop you will have to remove and the channel it goes through must come out as well for the Timbren...
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  • How To Level The Rear Of A 2000 Ford F-250
    I have the perfect options for you. In order to level the rear of your 2000 Ford F-250, I recommend using a set of heavy duty jounce springs such as the Timbren Rear Suspension Enhancement System part # TFRTT350E or a set of rear air bags like the Firestone Ride-Rite Air Helper Springs part # F2550. The jounce springs will help to level the added weight over the rear axle by replacing the factory bump stops with a set of heavy duty rubber bump stops positioned over rear axle under the...
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  • Timbren Rear Axle Jounce Spring Kit for 2002 Ford F-350 4WD Towing 34-Foot Travel Trailer
    The SumoSprings Rear Axle Jounce Spring kit # SSR-114-54, which fits the 2WD version of the 2002 Ford F-350, has a 2800-lb weight capacity which would be suitable for your travel trailer application but since you have lift on the truck I suggest the Timbren kit # TFR350SDE if you have 2WD or kit # TFRTT350E if you have 4WD. For these kits we have spacers available for lifted trucks that will ensure you can position these springs at the correct distance above the axle. When the truck is...
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  • Helper Springs for a 2000 Ford F-250 Towing a 5th Wheel Trailer
    For your 2000 Ford F-250 towing a 5th wheel trailer I recommend the Timbren helper springs but the ones you will need are # TFR150SDE because the other ones you mentioned are for Severe Service vehicles only. Since you need support from towing a 5th wheel trailer the Timbrens are a better option than air bags. This is because the load weight and position will basically be exactly the same every time which is what Timbrens are good for. Air bags are better if you carry uneven load frequently...
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  • Best Timbren Suspension Enhancement For 2003 Ford F-250
    There is a big difference between the two Timbren kits that fit your 2003 Ford F-250, as the # TFR250SDE is for applications like towing a 5th wheel trailer or travel trailer, and the # TFRTT350E is for service trucks or work trucks. They are not the same with stiffer rubber, the difference is the # TFRTT350E is single-convoluted so it does not have almost any "give" to it. So the correct kit for your '03 F-250 is the following: - Timbren Rear Suspension Enhancement System # TFR250SDE This...
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  • Would the Timbren System for a 1999 Ford F-350 Affect the Ride Height
    The Timbren Rear Suspension Enhancement System # TFRTT350E that you referenced will not affect your unloaded ride height at all on your 1999 Ford F350HD. These do not begin helping support your factory suspension until the suspension has been compressed somewhat, so basically your vehicle will feel and look unaffected when not loaded. I attached an FAQ article on Timbren systems for you to check out also.
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  • Available Suspension Kits for 1997 Ford 2WD F-350 Dually Diesel Pickup
    We do not offer a steering damper for your 2WD 1997 Ford F-350 dually diesel pickup but we do offer suspension enhancement kits for both front and rear axles that can be seen on the linked page. These kits include air bags like Firestone rear axle kit # F2071, jounce springs such as Timbren kit # TFRTT350E and helper leaf spring kits like SuperSprings # SSA22. The steering dampers we offer, such as Roadmaster # RM-RSSCP30, are for motorhome applications.
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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Mary K
Updated by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Anna W
Updated by:
Anna W
Employee Michael B
Updated by:
Michael B
Employee Carrie F
Updated by:
Carrie F
Employee Bethann B
Updated by:
Bethann B
Employee Jonathan Y
Video by:
Jonathan Y
Employee Robert C
Installed by:
Robert C
Employee Andy C
Installed by:
Andy C

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