1. Vehicle Suspension
  2. Timbren
  3. Jounce-Style Springs
  4. Rear Axle Suspension Enhancement
  5. Extra Heavy Duty
Timbren Suspension Enhancement System - Rear Axle

Timbren Suspension Enhancement System - Rear Axle

Item # TFRTT1504E
lowest price pledge
Retail:$271.42
Our Price: $225.40
You Save: $46.02
Vehicle Suspension

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

This item qualifies for Free Shipping
Shipping Weight: 13 lbs
Quantity: 
Timbren Jounce-Style Springs Vehicle Suspension - TFRTT1504E
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

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.

Product Images

In Use/Installed

Customer Photos

7,000-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. Lowest Prices for the best vehicle suspension from Timbren. Timbren Suspension Enhancement System - Rear Axle part number TFRTT1504E can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (2330)
  • Q & A (18)
  • Photos
  • Why etrailer?

Timbren Vehicle Suspension - TFRTT1504E

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

7,000-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
    • Allows the leaf spring ample movement while cushioning light loads
      • Rides just as smoothly when you're not hauling a load
    • Becomes more rigid as more weight is added for 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 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 a simple installation
    • Installs directly onto frame
    • No drilling required


Specs:

  • Load-leveling capacity: 14,000 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


Reduced rear axle sag with Timbren suspension enhancement

Whether you're hauling heavy loads in your bed or cargo area or 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 your rear axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down to where the bottom of the leaf 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.


Action 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.


Trailer swaying as it is towed behind a truck

Because your 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 SES

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.



FRTT1504E Timbren SES with Aeon Hollow Rubber Springs - Rear Axle

Installation Details TFRTT1504E Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Timbren Suspension Enhancement System - Rear Axle - TFRTT1504E

Average Customer Rating:  4.7 out of 5 stars   (2330 Customer Reviews)

7,000-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.

- TFRTT1504E
by:
Ford Five Hundred

Functionally these Timbren Rubber Springs provide additional load capacity and reduce tipping while turning around corners on my F-150 as claimed; however, the set I purchased was overly stiff (I was only hauling 500 additional pounds). Timbren provided a replacement set with lower capacity which helped tremendously; however, it still rides slightly stiff. I wish Timbren or a competitor would provide these rubber springs in different durometers that provide 1000 lb increments to fine tune the suspension - reducing the over stiffness performance. 655944


Comments
The ride is still too stiff for my preference. I continue to be on the lookout for incremental rubber durometer springs that enable fine tuning suspensions.
Gerard G - 06/11/2020

80496

- TFRTT1504E
by:

Timbren Suspension Enhancement System - Rear Axle Item # TFRTT1504E Just had a chance to install the Timbren. Went on a short drive with no load and have not hooked up the trailer yet. About an hour to install, the instructions where not very good but going on line etrailer site and followed the video. Very good product! 734943



- TFRTT1504E
by:

I will write a review as soon as they are installed. They came through as advertised the quality was above my expectation. I am looking forward to testing them with my boat in tow. 578110



- TFRTT1504E
by:

Installation was easy- did not require raising the truck as with correct socket extensions it’s doable. Would be nice if components had better paint adhesion. Also the u-bolts/brackets did not have any paint at all!! 572267



- TFRTT1504E
by:
2017 Ford F-150

Product works as described. Handle the loads well not that hard a ride with my 27 foot trailer a tow 607158



- TFRTT1504E
by:

I owned these for about a year and just recently switched to air bags instead. While the Timbren spring helped level the truck under load, there were other things that I was not satisfied with. One issue was the amount of distance the truck would drop until the Timbren would engage, I would have like to see them take affect sooner. I did not like the ride while empty. When hitting a decent size bump in the road the spring would slam into the stop causing for a very jolting ride. Also while under load and the Timbren was engaged, it made the truck extremely bouncy. Again it did stop the truck from further squatting under heavy load, but the other factors were what made me switch out for air bags, to which I have been very happy with. 565705



- TFRTT1504E
by:
2015 Ford F-150

Simple install and works very well on my 2015 F150 4x4. The truck feels way more solid while towing and you don't notice the Timbrens while the truck is unloaded unless on a really bumpy road. Overall great product for the price! 538585



- TFRTT1504E
by:
2017 Ford F-150

This is the second time I purchase and install these, the first was for my 2013 F150 and now on my 2017 F150. I towed my 9600lb bumper pull RV with the new 2017 truck before i ordered this second set, just to see if i noticed the difference. I loved the last set but heck, life is about experiences right? Those of you who have these are laughing right now as you know what I'm going to say. HUGE difference, noticed the absence right away. Got home from that camping trip, straight on my computer to order this latest set. As far as I'm concerned this is the best $200 bucks you'll spend. You have extra cushion when it matters most and it doesn't affect your ride at all when you don't. They are very easily to install and you don't have all the extra equipment etc as with an airbag system. I'm not the kind of guy who works on his truck, I don't consider myself mechanical at all yet i didn't have any problems with the installation. The only "issue" i had was when attaching the stop bumper to the metal mount. The screw is just long enough so i could get the tension i needed to get it threaded (the head of the bolt would drop slightly within the socket). I was able to get it threaded by using my index finger to hold the bolt and my ring finger to turn it, just enough to get it started. After that I was fine. As i mentioned, I'm not mechanical so my tool options were limited. Just bring some patience with you and you'll be fine. The instructions are good. As long as I'll be towing a camper, I'll have a set of these on every truck I own. 400940



- TFRTT1504E
by:

had to lay in driveway but after removing rear wheels took 15 minutes each side.ez install. 893856



- TFRTT1504E
by:

got this product on time as expected. will be installing tomorrow. 876416



- TFRTT1504E
by:
2016 Ford F-150

Nicely made product and the welding is very good. All parts arrived on time and in place. The instructions are not all that good, but there are plenty of YouTube videos out there to guide you through the installation if you need help. Installation took a little while for me but I had some difficult to remove old hardware ,and lying on my old back while I work is not as easy at it used to be. However, I did not need to remove any wheels or jack up the truck so that simplifies the task. I have not have a chance to load up the truck yet, so there is no difference in the way that my unladen vehicle rides. 828833



- TFRTT1504E
by:
2016 Ford F-150

The Timbren rubber spring was ordered, delivered and installed in June 2020. It was installed on a 2016 F150 two-wheel drive. The vehicle has stock suspension – no lift kits or leveler kits. I found that the nuts and bolts were loose in the box. The plastic bag containing them was open at the top. Fortunately, none of the nuts or bolts had fallen out of the hole in the box. For the install, I jacked the back of the truck up and took the rear tires off. I was able to install most parts from the side. I found this easier than crawling under the truck. The install went smoothly and took about one hour – including time to remove and replace the wheels. Of the three different nuts and bolts used during the install, torque requirements were provided only for one nut. I guess the two bolts are not critical. The part came with a 1” rubber spacer. The instructions say that the gap between the rubber spring and the contact point should be between ½” and 1 ½”. As installed, the gap was ½ “ - at the bottom of the manufacturer’s guideline. When I drove the truck around, I could feel the rubber spring bottoming out as I drove over normal road bumps and I didn’t like this hard ride. So I removed the spacer. The gap is now 1 ½ ” – at the top of the manufacturer’s guidelines. But the empty ride is so much better. Of course, the rubber spring when loaded, is less compressed and there is naturally more stress on the leaf springs. This is the situation that the rubber spring was supposed to fix. It seems that the install would have been better with either a ¼” or ½” spacer. I would think the optimum installation would be a gap measurement near the mid-point of the gap range. The ½” spacer would be close to this point and should have been the spacer supplied but apparently that is not what is specified for Ford trucks. The 1” spacer is basically useless. 827714



- TFRTT1504E
by:

Great customer service! On time delivery when I needed it most! 799986



- TFRTT1504E
by:
Chevrolet Colorado

The product does what I bought it for which was to stabilize the ride when I was towing our 23 foot travel trailer. I was experiencing a bouncing floating sensation when towing the trailer before, after having the product installed and tested by hauling the trailer around Colorado last year I was happy with the results. The only complaint I have is that when I'm not hauling something there is not enough clearance between the product and the axle, which results in a rough ride when I go over even a small bump. I believe if I were to stop hauling the trailer I would definitely have the product removed. 793594



- TFRTT1504E
by:
2017 Ford F-150

Went onto 2017 F-150 very easily. I just jacked up the rear bumper a little and to drop the axle a bit, and everything fit well. Took me about 1.5-2 hours to complete. 775558



- TFRTT1504E
by:
2017 Ford F-150

fast shiping , good price , good produc t 774912



- TFRTT1504E
by:

They are what I wanted and delivered faster then I thought. Very happy with your company 749418



- TFRTT1504E
by:
2018 Ford F-150

Great fit, great product, easy install. Very happy! 746546



- TFRTT1504E
by:

High quality product. Easy install! T hanks. 745169



- TFRTT1504E
by:

I purchased these to help with the poor rear suspension on a 2018 F150 while towing my 27’ camper. They will definitely stiffen up the rear end but in return they make the ride like an Abrams Tank. 663431



- TFRTT1504E
by:

Great product. Does a good job of leveling the truck when the 5er is hooked up. 662737



- TFRTT1504E
by:

I was surprised at how easy the OEM ones were to remove and how incredibly east the new ones were to install. I read the reviews and saw that there was more of a jolt when hitting potholes and rough roads. I believe the clearance between the plate and the buffer is about an inch. I have a 32 foot trailer I haul that holds a sub compact tractor, a mini hay baler, mower, rake and hay spears. I was concerned that the weight would damage the springs. So knowing the rougher ride when on bumpy roads, I felt it was the best option that was in my price range! That you so much!!!!! 628212



- TFRTT1504E
by:

Can make ride rough when empty. Do to loss of normal suspension room you hit the bump then you hit the new rubber suspension. With a load on it works very well. good directions and install. 590180



- TFRTT1504E
by:
2016 Ford F-150

Very easy install, had it unpackaged and on the truck in under an hour! Happy with the product. Simple and easy install. 542636



- TFRTT1504E
by:

Am happy with these. Install isn’t hard, and they work excellent for trailering heavy loads (10,000 lbs in my case with a half ton truck) 525095


26
2648
Show More Reviews

Ask the Experts about this Timbren Vehicle Suspension

  • How To Fix Trailer Bounce When Towing and Suspension Enhancement For 2018 Ford F-150
    The suspension enhancement options for the 2018 Ford F-150 may help with the porpoising effect that you are experiencing. However, usually porpoising is caused by the trailer weight not being properly distributed. If there is too much weight in the back of the trailer the weight could cause the trailer to bounce. You want to try to make your tongue weight 10-15% of the overall weight of the trailer. If you are at 10% try to make it 15%. I recommend to use a tongue weight scale like part...
    view full answer...
  • Recommended Suspension Enhancement for 2016 Ford F-150 Crew Cab 4x4
    The Timbren Suspension Enhancement System # TFRTT1504E is a confirmed fit for your truck. With a 1,100 lb tongue weight trailer, this system will help to keep the rear end from squat and your headlights from being too high to see the road as intended. These will act as a shock absorber as well as helping to stabilize your truck when under load. These spring are made for severe service vehicles like tow trucks so I don't recommend then for your truck as they can actually cause your truck...
    view full answer...
  • Timbren Suspension Kit Recommendation for 2020 Ford F-150 4x4
    The difference between the Timbren rear suspension enhancement options for the 2020 Ford F-150 4x4 is that Timbren system part # TFRTT1504E is more for commercial use such as service trucks like tow trucks, they are also rated for 7,00 lbs. The Timbren system part # TFR1504E is designed for regular pickup trucks are rated for 6,000 lbs. The TFR1504E is what you need for a pickup truck. I have attached an installation video for your reference.
    view full answer...
  • Timbren Suspension Enhancement System Warranty and Return Policy
    The Timbren Suspension Enhancement System - Rear Axle # TFRTT1504E is a confirmed fit for 2015 -2018 Ford F-150 models. It has a lifetime warranty against defects in material and workmanship and is limited to the replacement of the failed part. I've attached the installation details that give you more details. Timbren products are well made and extremely durable. They are easy to install and require no maintenance. Our return policy is attached for your viewing as well.
    view full answer...
  • Compatibility of Timbren Jounce Spring Suspension Enhancement with 5th Wheel In-Bed Hitch
    If you have a 2015-2018 Ford F-150 I recommend the Timbren Rear Suspension Enhancement System # TFR1504E which will work very well for a 5th wheel hitch application whether with raised base rails or underbed mounting. The jounce springs # TFRTT1504E you asked about will also work, but they are designed for Severe Service vehicles like tow trucks and won't serve you quite as well for your 5th wheel trailer. While you are upgrading, you may consider adding the Hopkins Endurance 5th Wheel/Gooseneck...
    view full answer...
  • Recommended Suspension Enhancement for 6 Inch Lift and Off-Road Trailer Towing
    With your 6 inch lift, the Timbren springs do have spacer availability, however the # TFRTT1504E is designed for severe service vehicles like tow trucks and would not be ideal in any way for off-road use. I definitely don't suggest Timbren springs for your application as they are designed for on the road towing and are really firm for support. For your truck I recommend the Firestone Ride-Rite Air Helper Springs # F2582 because they are extremely adjustable for your needs. They come...
    view full answer...
  • Recommended Rear Axle Suspension Kit For 2020 Ford F-150 4WD Short Bed
    If set and forget is your primary driver here, Timbren Suspension Enhancement System # TFRTT1504E is what I recommend. These sturdy rubber springs provide additional support and provide a comfortable ride. They will become more rigid as more weight is added which helps to stabilize your tow setup. Best of all there are no adjustments or maintenance required once installed. Included are video resources for additional information to get you started.
    view full answer...
  • Comparing Timbren Suspension Enhancement Kit for 2015 Ford F-150 To Factory Bump Stop
    The Timbren Suspension Enhancement System - Rear Axle # TFRTT1504E once the brackets are installed on the top and bottom and with the integrated spacer will give you 1-1/2 inch of clearance between the jounce spring and bracket compared to the 4-1/2 or so inches more movement with the factory jounce bump stop. I've attached a video that shows the comparison for you.
    view full answer...
  • Suspension Enhancement Recommendation- 2020 Ford F150 Towing Small 5th Wheel
    A jounce spring replacement like the Timbren # TFR1504E would be a great choice. The Timbren Aeon spring will not change the ride of your truck unless the rear suspension is compressed (like when a fifth wheel is hitched up). As more weight is added, the springs get progressively firmer. Because the springs replace the factory jounce bumpers, the Timbrens won't interfere with the bracketry for your firth wheel hitch. The springs will also make your truck feel more stable in turns and can...
    view full answer...
  • Type of Wrench Needed to Install Timbren TFRTT1504E Suspension Enhancement Springs on 2017 Ford F150
    Because the bolt holding the factory bump stop and the bolt provide with the new Timbren # TFRTT1504E Aeon spring is countersunk, you will indeed need a 13mm ratchet with a 6 or so inch extension to remove the existing bump stop and install the new Timbren spring. It couldn't be done with a standard wrench. I've linked to an insallation video that would walk you through the whole process.
    view full answer...
  • Things To Consider When Changing from a 3/4 Ton to 1/2 Ton Tow Vehicle
    There are a few things you need to consider when switching from a 3/4 ton like your 2008 Chevrolet Silverado 2500 to a 1/2 ton like a 2018 Ford F-150. For starters, the 3/4 ton is going to have a stiffer suspension than the 1/2 ton. This means that although the 3/4 ton did not squat while towing your trailer, that's not to say that the 1/2 won't even though it may still have a higher towing capacity. Also, the 3/4 ton will be more geared towards towing while means it likely has upgraded...
    view full answer...
  • Timbren Suspension Kit Recommendation for 2016 Ford F-150 4x4
    Both of the kits you mentioned are a fit for your 2016 Ford F-150. The difference is that the part # TFR1504E has a 6,000 lb capacity and the part # TFRTT1504E has a 7,000 lb capacity. You would want to go with the lower rated spring as it will be a smoother ride quality. The higher capacity will be harsher. A 13 mm socket will be used to remove the bolt that holds your current bump stop in place. You basically will then need to use the attached diagram to assemble all of the Timbren...
    view full answer...
  • Using the Timbren Suspension Enhancement System On a Lifted 2015 Ford F-150
    We have both front and rear Timbren Suspension Enhancement Systems for your 2015 Ford F-150. For the front of your truck you will want to use part # TFF150G and for the rear you will want to use part # TFRTT1504E. Timbren recommends a distance of 1" from the bottom of the bump stop to the top of the contact point. You can achieve this distance on trucks that are lifted using increments of the Timbren 1/2" Spacer part # TA25722-90P00 and the Timbren 1" Spacer part # A25723-90AH00 until the...
    view full answer...
  • Rear Suspension Enhancement Recommendations For A 2016 Ford F-150 XLT
    You have several options to choose from in order to enhance the rear suspension of your 2016 Ford F-150 XLT while towing. Each of which has their own individual pro's and con's The best way to combat vehicle sag when towing a trailer is a weight distribution system because it will distribute the weight on the rear axle across the entire vehicle and trailer. Choosing the right system is very important. You will first start off by measuring the total tongue weight of your ready to tow...
    view full answer...
  • Recommended Airbag Kit for a 2015 Ford F-150
    For a set of airbags that will work with your 2015 Ford F-150, I recommend taking a look at the Firestone Ride-Rite Air Helper Springs part # F2582. The Ride-Rite airbags will maximize safe load carry capacity, increase stability, and improve overall ride quality. The air pressure is adjustable for each airbag therefore you can adjust the pressure to suite your needs. In order to operate the airbags from inside the cab of your vehicle, I recommend the Firestone Air Command I part # F2158....
    view full answer...
  • Suspension Enhancement for 2016 Ford F-150 with 6 inch Lift
    As long as the leaf springs of your 2016 Ford F-150 are the same the Roadmaster Active Suspension # RAS3611-B will still fit. If the spring changed it's hard to say for certain what RAS kit would fit it since it would not have ever been tested. The other options will be harder to fit since you have such a lift. But if you have a different leaf spring I'd recommend a Timbren part # TFRTT1504E with lift spacers # A25723-90AH00. You'd need a spacer for each inch of lift so you'd need a...
    view full answer...
  • Recommended Suspension Enhancement for 2020 Ford F-150 Crew Cab 4x4
    The Timbren Suspension Enhancement System # TFRTT1504E is a confirmed fit for your truck. With a 1,100 lb tongue weight trailer, this system will help to keep the rear end from squatting and your headlights from being too high to see the road as intended. These will act as a shock absorber as well as helping to stabilize your truck when under load. These spring are made for severe service vehicles like tow trucks so I don't recommend then for your truck as they can actually cause your truck...
    view full answer...
  • Cost Effective Camper Tie Downs for Use with 2017 Ford F-150
    I called my contact at Brophy and they informed me that they tested the Brophy Clamp On Camper Tie-Downs part # HSAB on an aluminum body Ford F-Series pickup and didn't have any problems doing so therefore, yes they will work well for you. If you have a drop in bedliner that extends up to the side rails on the bed then they will need to be trimmed in order for the camper tie-downs to mount properly. In order to secure the truck bed camper to the tie-downs you will need a set of turnbuckles...
    view full answer...

Do you have a question about this Vehicle Suspension?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality vehicle suspension for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate vehicle suspension information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Mike L
Video by:
Andrew K
Video by:
Zach D
Video by:
Jonathan Y
Installed by:
Jeff D
Video Edited:
Jacob T
Video Edited:
Chris R
Test Fit:
Randy B
Test Fit:
Robert C
Updated by:
Mary E
Written by:
Sarah W

At etrailer.com 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.