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  1. Vehicle Suspension
  2. Timbren
  3. Bump Stops
  4. Towing/Load Leveling
  5. Rear Axle Suspension Enhancement
  6. Extra Heavy Duty
THIS ITEM IS NOT A FIT FOR
2009 Jeep Liberty
Timbren

Timbren Rear Suspension Enhancement System

Part Number: TFR350SDF
In Stock
$398.07
Retail:$468.32
You Save: $70.25
Vehicle Suspension
Not Confirmed to Fit

2009 Jeep Liberty

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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 Rear Suspension Enhancement System part number TFR350SDF can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TFR350SDF

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

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
      • 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: 8,600 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 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.



FR350SDF - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TFR350SDF Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

3569 reviews
5 Stars
(2841)
4 Stars
(462)
3 Stars
(115)
2 Stars
(69)
1 Star
(82)
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:

They worked as advertised. I would buy this product again.



by:

Always great experience.



by:

What a great product. This has made a night and day difference pulling a 5th wheel.



by:

I can't offer five stars yet, as I haven't installed them yet. I have to do some other work on the rear axle first. However, I did a fit test on one of them and they will work as advertised.



by:

I recently purchased a 2024 tundra hybrid platinum. With this being the luxury addition the rear suspension is lacking when in comes to towing when I would hook to my 7x16 enclosed trailer my truck really saved.
I purchased and installed the timbren ses stops and no more sag. The ride of my truck remains smooth when unloaded and the timbrens also stopef the side to side rocking. Will post another after I tow a few times.



by:

Easy to install great instructions and was shipped very fast really impressed



by:

Easy to install. You may need an impact wrench to break loose the u-bolts that have to be loosened.



by:

I never received the item so I canceled and ordered through [online store] I got it the following day. Now, months after I canceled my order, I received this empty box with and note from the mail carrier stating that he delivered an empty box.



by:

Exact fit and fast shipping!



by:

I actually found that airbags worked better for my truck and trailer. I ordered those from you as well. May I return the Timbrens for at least partial store credit?



by:

Exactly what I ordered and delivered in a timely fashion!! Thank you!



by:

Google product, worked great with the new trailer I was towing. I need the information on the ones for the front of my Ram 1500 2016 ecodiesel



by:

Would be great to have better instructions and car specific.



by:

Great product, reasonable price, easy to install and great customer service!



by:

So far so good works great, now let's see how long they last?



by:

Installed this on my 2001 Explorer. Install is easy (assemble unit, bolt on in place of existing bump stop). Annoyed to find it doesn't fit. Specs are gap 1/2"-1-1/2"; there was a gap of 2-3/4". Yeah, they sell spacers for $27 each, but it's really annoying to buy a $225 product that says it fits your truck, only to find that you have to spend 50% more to actually adapt it to your truck!



by:

Fast shipping would definitely recommend



by:

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



by:

Easy install. Haven't hauled my trailer yet.



by:

Worked excellent for trailering.



by:

Very easy to install took about 30 minutes. If it manages the weight of my trailer I will be more impressed with your product.



by:

Works great will never have air bags ag ain



by:

Easy to install. Works as advertised. Etrailer rocks!



by:

I have not fully loaded my Odyssey yet BUT compare to original “pacifiers” which are made from kinda tough popcorn, those timbers are looking reliable.



by:

Fast shipping


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3569
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See what our Experts say about this Timbren Vehicle Suspension

  • What is the Difference Between a Rear Air Bag System and a Weight Distribution System
    Basically, a weight distribution system moves some of the load up the vehicle frame so that the front suspensions bears some of the weight. Weight distribution spreads some of the weight from the rear axle to the front. An air bag system spreads the weight across the rear axle. Instead of having 2 springs bearing the load, you now have 4. When towing large trailers, air bags should not be used instead of a weight distribution system. A hitch and vehicle will have a Weight 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.
    view full answer...
  • Comparison of Jounce-Style or Air Bag Suspension Enhancement
    Jounce-style helper springs are easier to install than air bags since they're less parts involved. Also, once they are installed you basically leave them alone. Air bags need to have the air pressure monitored and changed according to the load that's being carrier. The jounce-style will not impact the ride quality unless there is load present. The benefit of the air bags is that you can adjust them to your liking when you need to. If the weight in your truck varies on a regular basis...
    view full answer...
  • Differences Between Air Springs and Jounce Style Springs
    The Firestone Ride-Rite Air Helper Springs # F2550 for your 2011 Ford F-350 maintain an even load distribution using air pressure. The Firestone air bags' air pressure is adjusted for the weight of each individual load. This system includes air lines that run from the air bag to an easily accessible point on your vehicle's bumper. These air bags can be adjusted independently of each other for off-center loads. This system is dependent on an air tank of some kind, such as those found at...
    view full answer...
  • Is the Timbren Suspension System or TorkLift the Better Option for a 2015 Ford F-350
    I recommend going with the Timbren Rear Suspension Enhancement System # TFR350SDF. Even though the TorkLift StableLoad Suspension Upgrade for Upper Overload Springs # TLA7200 that you referenced are a good option, the Timbren system does a better job at stabilizing the weight. The TorkLift option will activate your leaf springs much sooner when they are under a heavy load, but the Timbren option provides additional support for your lift springs and takes on the brunt of bumps and rough...
    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...
  • 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...
  • How to Install the Offset Timbren Rear Suspension Enhancement on a 2011 Ford F-350 Super Duty
    The Timbren Rear Suspension Enhancement System, # TFR350SDF, is confirmed to fit for a 2011 Ford F-350 Super Duty truck. The offset design Aeon spring will replace the OEM stop and will align with the rear axle. I have attached an installation video of the Timbren being installed on a 2013 Ford F-350 and a picture of the unit installed in the offset position on the Ford truck.
    view full answer...
    Image 1 for
  • Rear Suspension Enhancement For A 2011 Ford F-250 Super Duty
    For your 2011 For F-250 Super Duty if you are adding the Timbrens I would stay with your factory 2" block. If you install Timbren Rear Suspension Enhancement System Item # TFR350SDF you can add 1 or 2 of the Timbren 1" Spacer For Raised Frame Vehicles - 3/8" Bushing Item # A25723-90AH00 but it will require a longer bolt than what comes in the kit. This allows you to install the Timbrens and get the extra 2". Keep in mind the Timbrens are not going to give you any adjustability, your vehicle...
    view full answer...
  • Compatibility of Timbren Jounce Spring Kit # TFR350SDF with 2008 F350 with B&W Turnover Hitch
    I contacted the technical staff at B and W to confirm compatibility of their Companion 5th wheel hitch with aftermarket rear suspension kits such as the Timbren Jounce Spring Kit # TFR350SDF in your 2008 F350. My contact there advised that a jounce spring like this kit will not interfere with the hitch installation. This kit installs in place of the factory jounce bumper. Please refer to the attached photo which shows the mounting location. Hardware is included. Advantages of this type...
    view full answer...
    Image 1 for
  • Timbren Suspension Kit Recommendation for 2015 Ford F-350
    For your 2015 Ford F-350 crew cab short bed single rear wheel the Timbren kit part # TFR350SDF is a confirmed fit and will work great. This kit can provide up to an additional 8,600 lb of suspension support and fits versions of your truck that have and do not have the overload springs.
    view full answer...
  • Suspension Enhancement Options For A Lifted 2006 Ford F-350 Pulling A 10,000 lb Trailer
    Hello Stephen, thanks for reaching out. The RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3611-HD will certainly help with your sway issues. It will help to level your ride which will in turn improve handling and reduce sway. I see that you also ordered the Timbren Rear Suspension Enhancement System # TFR350SDF which is also a good choice. These will add quite a bit of additional support when you are hauling your trailer. They will also reduce sagging and help with stability...
    view full answer...
  • Differences Between Timbren Helper Springs TFR350SDF and TFRTT350F for a 2016 Ford F-350
    Timbren helper springs # TFR350SDF and # TFRTT350F both fit the 2016 Ford F-350. Kit # TFRTT350F is rated for 8,000 pounds but was designed for sever service vehicles such as tow trucks. Kit # TFR350SDF is rated higher at 8,600 pounds and fits regular consumer pickup models. The kits use different rubber springs and different upper brackets as well. I have linked the instructions for both for you to compare.
    view full answer...
  • What is the Estimated Installation Time for Timbren Springs on a 2008 Ford F-350
    Both the front Timbren kit # TFF350SDC and rear kit # TFR350SDF can be installed in about an hour per kit. It will help to have someone helping. These kits are fairly straight forward to install. I have included a link to the installation instructions for each kit for you. Installation times can change based on the installers level of ability and whether or not all of the tools needed are readily available. I have included a link to our FAQ article on Timbren springs for you.
    view full answer...
  • Recommended Suspension Enhancement System for a 2012 Ford F-350 4x4 with Max Tow Weight of 15,500 LB
    I recommend going with the Timbren rear suspension system # TFR350SDF because it will keep your 2012 Ford F-350 4x4 more level and improve driving performance. The Timbren springs won't compress as much and have a higher weight rating. I think you will be very pleased with the Timbren system because they are designed to work with heavy loads. The weight capacity is 8,600 pounds and will be more than enough for your setup. The reason I wouldn't choose the SumoSprings is because they have...
    view full answer...
  • Which Timbren Rear Suspension Enhancement To Use On A 2008 Ford F-250
    I recommend going with the Timbren Rear Suspension Enhancement System Item # TFR250SDF for your 2008 Ford F-250. These are designed to support the weight in the back of the truck. Since your hauling a 5th wheel and the hitch weight is only 1430lbs the Timbren Rear Suspension Enhancement System Item # TFR350SDF would be overkill.
    view full answer...
  • Recommended Weight Distribution System for 16,000 lb Equipment Trailer
    For your 2016 Ford F-350 Diesel, I recommend removing your factory hitch and installing the TorkLift SuperHitch Magnum Trailer Hitch Receiver # TLF1002-30. This is a confirmed fit for your truck and really the only way to get your weight distribution compatible with that trailer size at the bumper. Then you will use the TorkLift SuperHitch Everest Weight Distribution System # TLWD1000 with Adjustable Shank XL for TorkLift SuperHitch Everest Weight Distribution # TLM9011 or # TLM9010 depending...
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  • Compatibility of B&W Gooseneck Hitch and Timbren Springs for 2008 Ford F-250
    The correct rear axle Timbren Jounce Spring kit for your 2008 Ford F-250 4X4 is part # TFR250SDF. The kit # TFR350SDF you referenced fits the F-350. Any suspension kit can potentially have interference with either a 5th wheel or goose neck hitch if the two items require the same mounting points on the truck's frame. You can use the Timbren installation instructions I have linked to see where these jounce springs attach (in place of the factory bump stops) and compare that to your hitch...
    view full answer...
  • Solution for Rear-End Sag in 2012 Ford F-350 4X4 Pulling 16K 5th Wheel Trailer
    Suspension enhancement kits such as the Firestone Air Springs and the Timbren and SuperSprings jounce springs that you referenced are intended primarily to support heavy cargo loads in the truck bed, but you will get some benefit when towing your 5th wheel by giving the rear suspension some additional support. If you often remove your 5th wheel hitch to haul uneven heavy cargo loads then the higher cost and installation complexity of a Firestone Air Spring system may be worthwhile; if...
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  • Timbren Kit for 1994 Ford F-350 Towing Fifth Wheel Trailer
    Yes the Timbren kit part # TFR350SDF is a confirmed fit for your 1994 Ford F-350 and would do a great job providing additional support for the rear suspension when towing a 5th wheel trailer.
    view full answer...
  • Recommended Jounce Enhancement Kit For A 2016 Ford F-350 Towing A 13,0000 Pound 5th Wheel
    If you are not wanting to go with an air bag kit, you will have two options available. The first, and the most heavy duty, is the Timbren Rear Suspension Enhancement System # TFR350SDF. This will not affect the ride height and will definitely shore up the suspension when under load. However, as these are rated up to 8,600 pounds of capacity, they are going to be pretty stiff and will affect your ride quality fairly severely when not under load. These do a great job when they are under load...
    view full answer...
  • Does Timbren Rear Suspension Enhancement System Item # TFR350SDF Fit 2004 Ford F-350 Dually
    Yes, the Timbren rear suspension kit part # TFR350SDF is a confirmed fit for your 2004 Ford F-350 4x4 dually long bed.
    view full answer...
  • Suspension Enhancement that Can Fit 2007 Ford F-350 4x4 with Curt Gooseneck Hitch
    We have suspension enhancement kits that will work great on your 2007 Ford Super Duty but none of the air bag kits fit with under bed rail kits like what you have due to the brackets interfering with each other. So the best option is a Timbren kit part # TFR350SDF which will give you the same support you want but has advantage not ever requiring any maintenance since there's no bag that has to be inflated and also offers a really easy install. I attached an install video for this kit for...
    view full answer...
  • Suspension Enhancement to Reduce Squat Experienced When Trailer is Hitched to 2006 F350 Dually
    Adding an additional leaf spring would somewhat increase the height of the rear of your truck, as you suspected. A suspension enhancement product like the Timbren part # TFR350SDF you mentioned is primarily designed for loads placed in the truck bed. In most cases, using this product will somewhat decrease the squat you are experiencing, but the weight being applied to the rear of the vehicle will lighten the front end, resulting is decreased front braking performance and steering response. A...
    view full answer...


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