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  1. Vehicle Suspension
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  3. Jounce-Style Springs
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Timbren Rear Suspension Enhancement System
Timbren

Timbren Rear Suspension Enhancement System

Part Number: TTORTUN4L
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$269.36
Retail:$316.90
You Save: $47.54
Vehicle Suspension

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3,000-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. Great Prices for the best vehicle suspension from Timbren. Timbren Rear Suspension Enhancement System part number TTORTUN4L can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TTORTUN4L

  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Timbren
  • Standard Duty

3,000-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
    • 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: 3,000 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.



TORTUN4L - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TTORTUN4L Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Timbren Rear Suspension Enhancement System - TTORTUN4L

Average Customer Rating:  4.7 out of 5 stars   (6498 Customer Reviews)

3,000-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.

by:

Easy to install, and do a great job. 2016 Dodge 1500 hauling Lance 650, total weight of camper fully loaded, around one ton ...

w.



by:

Shipped promptly and the product arrived when scheduled. Great communication from etrailer as well.



by:

This product is easy to install, and does exactly what it is intended to do. My husband pulls a 18 ft trailer loaded with plumbing equipment everyday. The sag is gone, the drive is a lot smoother than before. He is loving the way his van is now handling.



by:

BIG difference in handling a load or trailer ... what a great product!!!



by:

Received a day ahead of schedule, packaging was in tach , installation was quick and simple . Have them installed but yet to load the pick up to see how they work or I would have given five stars



by:

Excellent product. Just what I needed. Etrailer great company to deal with very informative. Thank you.



by:

Quick and easy install, haven’t hauled anything yet or towed my trailer but excited so put these to use!



by:

Fast delivery about 3 days easy to install and seems to work fine. Ride is a little stiffer with loaded trailer but not bad.



by:

Easy install and noticable change in suspension performance. Makes a great addition if you are pulling a trailer or hauling loads.



by:

So easy to install. Just use supplied bolts to assemble the spring to the plate. Then use bolts from your bump stop to attach to the frame. Check your clearances and your done!



by:

Everything arrived as promised been towing with the product a week or so really helps with truck Sway and bounce



by:

This product was delivered quickly and efficiently. The quality of the product is excellent and look forward to seeing how they work when we are towing our trailer.



by:

Very easy installation took about 20 minutes. Set alarm inch to an inch and a 1/2 above my axle. For a 2021 Silverado 2500



by:

Works good when pulling trailer take them out when not pulling for smoother ride only takes about 10 minutes



by:

Bolted in like a factory part, i didnt require the entra spacers. No change in unloaded ride quality, but with 3000# in the bed the truck felt more stable. Im am very happy with it so far.



by:

These work great, highly recommend.



by:

Etrailer answers my questions and has always steered me in the right direction with excellent products.



by:

Fast shipping products as described.



by:

Your company ships right away and very helpful web site easy to use have not installed yet but will let you know asap thanks for your help



by:

Definitely worked as advertised, very easy to install.



by:

This is a excellent product. I had them in my F-250 and when I bought my new RAM it was the first accessory I added. Best bang for the buck suspension product on the market today!



by:

Great product. I haven't installed this set on my new truck yet, but I had them on my older truck and they did the job they were intended to do. Only problem was when the package arrived, the box was split open to the point of everything falling out. But no parts were lost, this time.



by:

The service and delivery of these suspension assist was an example of professionalism. I am grateful.



by:

The rear enhancement springs I ordered was exactly what I ordered. Thank you!!!



by:

They did not fit right on my 2021 power wagon, I had to modify to make them line up with my differential and had to buy shorter mounting bolts for the bracket plus they where already used


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See what our Experts say about this Timbren Vehicle Suspension

  • Recommended Timbren Rear Suspension Enhancement For A 2019 Toyota Tacoma With 4WD
    Suspension enhancement systems like Timbren springs are perfect for the scenaro you're describing. These solutions supplement your factory suspension but don't necessarily increase your capacity. Timbrens are hollow rubber springs that sit above the rear axle to help stabilize and level your Toyota Tacoma. Below are what I recommend of the available spring choices. For off road applications, I recommend the Timbren Active Off-Road Bumpstops # TABSOSR for vehicles if the axles are...
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  • Suspension Enhancements for a 2017 Toyota Tacoma with Firestone Airbags
    I do have a suspension enhancement option for your 2017 Toyota Tacoma that is compatible with the Firestone Ride-Rite Air Helper Springs part # F2407, however, the Timbren Rear Suspension Enhancement System part # TTORTUN4L and the Roadmaster Active Suspension Kit part # RAS4514-SAT will not work. In order to use a set of suspension enhancements with your currently installed Firestone Ride-Rite Air Helper Springs, I recommend the TorkLift StableLoad Rear Suspension Upgrade part # TLA7311...
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  • Installation Instructions for Timbren Suspension System on a 2012 Nissan Frontier Pro4X 4x4 Off Road
    To install the Timbren Rear Suspension Enhancement System, # TTORTUN4L, on your 2012 Nissan Frontier Pro4x 4x4 you will need to safely raise the vehicle to allow the axle to hang freely, then loosen the axle u-bolts and remove the OEM rubber bump stop. Next, install the lower bracket from the Timbren kit where the OEM bump stop was. Finally, tighten the U-bolts and safely lower the vehicle. I have attached installation instructions for you to review.
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  • Comparing Jounce-Style and Air Bag Enhancements for Off-Road Camping in a 2010 Toyota Tacoma
    Hey Paul, thanks for reaching out again! Looking into suspension enhancements can be exhausting and overwhelming, especially when you've found a solution that works for you but it seems like there is a better alternative out there. You've stumbled upon the exact dilemma that faces everyone wanting to upgrade from jounce-style to air bag enhancement and there's nothing wrong with your thinking - or with either solution. The jounce-style you currently use are designed to be more cost-effective...
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  • How Much Space Between Leaf Spring And Frame For Timbren SES on 2011 Nissan Frontier
    Timbren recommends a 1" gap when the Timbren Rear Suspension Enhancement System # TTORTUN4L is installed. The overall height of this kit is 4.6" so the distance between your leaf spring and the point of contact where the old bump stop hits should be 5.6". It doesn't have to be perfect, but the greater the gap the longer it will take to engage. It is possible to add spacers to close the distance using the 1/2" # TA25722-90P00 and 1" # A25723-90AH00. Adding spacers will require longer bolts...
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  • Best Suspension Enhancement for a 2018 Nissan Frontier with Factory Ride Quality
    In regards to suspension enhancements for a 2018 Nissan Frontier, you have a few options but there are none from SuperSprings. The best option for unloaded ride quality would be the Firestone Ride-Rite Air Helper Springs part # F2558. However, if you don't want the maintenance upkeep of the airbags then the Timbren Rear Suspension Enhancement System part # TTORTUN4L are a great second best option. They can engage if you go over a big bump but aside from this they will retain a mostly factory...
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  • Will The Air Lift Air Bag Helper Springs # AL39DQ Fit a 2023 Nissan Frontier SV 4X4?
    The Air Lift LoadLifter 5000 Air Helper Springs # AL39DQ are confirmed by Air Lift to fit your 2023 Nissan Frontier SV 4x4. We currently do not have an installation video for this system as we only just began to carry the springs a few months ago(June 2023) and have not had any vehicles in for this installation. These are going to be far superior to the Timbren # TTORTUN4L for helping to keep your Frontier level. The Timbren creates a 1" gap for your suspension so they will not engage until...
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  • Fit & Height of Timbren Suspension Enhancement on 2019 Toyota Tacoma 4WD
    I reached out to Timbren, who told me the the actual jounce springs are both the same height at 3-3/4 inches, but the bracket height is different. So there aren't shorter springs, and the correct fit for your 2019 Toyota Tacoma 4WD is going to depend on the number of OEM leaf springs your Tacoma has. - 3 Leaf Springs: Timbren Rear Suspension Enhancement System # TTORTUN4L - 4 Leaf Springs: Timbren Rear Suspension Enhancement System # TTORTUN4 So it is possible that you may have the kit...
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  • Recommended Timbren Suspension Enhancements for a 2017 Toyota Tacoma with 4 Leaf Springs
    The Timbren Rear Suspension Enhancement System part # TTORTUN4L is designed to work with the 3 leaf setup on a 2017 Toyota Tacoma, but not the 4 leaf setup. For a 4 leaf setup you would need to use the Timbren Rear Suspension Enhancement System part # TTORTUN4. The jounce spring kit designed to work with 4 leaf spring models has a shorter mounting brackets to allow for the recommended 1/2" - 1" of space between the bump stop and rear axle. Although both jounce springs are the same, you...
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  • Recommended Suspension Enhancement for 2017 Toyota Tacoma with 2" Lift
    I have a solution for you, but because SuperSprings does not offer a lift spacer for the SumoSprings, using the # SSR-612-47 may not be the best solution in this case because of your lift. Instead, I recommend using the Timbren # TTORTUN4L which can be used with lift spacers like the # A25723-90AH00, which will help compensate for your 2" lift. The Timbren system won't effect your unloaded ride quality and allow the springs ample room for movement. I've linked some brief review and installation...
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  • Is Timbren Suspension Enhancement for 2019 Nissan Frontier Compatible With Lifted Truck
    You can install the Timbren Rear Suspension Enhancement System # TTORTUN4L on your 2019 Nissan Frontier with a suspension lift. In order to do so, you need to add the appropriate amount of spacers that will allow you to wind up with between 1/2" and 1-1/2" of space between the spring and its contact point above the axle. The spring itself measures 3-3/4" tall so you can use that as a guideline to determine how many of the following spacers you will need: - Timbren 1" Spacer # A25723-90AH00 -...
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  • Overall Height of Timbren Suspension Enhancement Springs # TTORTUN4 for a 2010 Toyota Tacoma
    I went out to the warehouse and actually pulled 2 possible fits for your 2010 Toyota Tacoma. First, for Timbren springs # TTORTUN4, the overall height from the bottom of the bracket to the top of the spring is approximately 5 inches. The other kit I pulled was # TTORTUN4L. This kit is a bit shorter at 4-1/2 to 4-5/8 inches tall overall. I have included links to hte isntructions for both kits as well as a link to our FAQ article on Timbren systems for you.
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  • Comparing Timbren Rear Helper Springs for a 2016 Toyota Tacoma 4x4
    The springs in both Timbren kits for a 2016 Toyota Tacoma 4x4, # TABSOSR, and # TTORTUN4L, are both 3-3/4 inches tall. The difference is that kit # TABSOSR is intended for vehicles without a U-Bolt Flip Kit. And # TTORTUN4L is designed for vehicles with 3 Leaf Springs in the rear suspension. To avoid a stiff ride a better option would be air bags, # F2407. They will allow you to adjust the air pressure in the bags for the best ride quality. I have linked a video review of the Firestone...
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  • Comparing Timbren Suspension Enhancement for 2018 Toyota Tacoma
    There are six different Timbren kits for suspension enhancement that all fit your 2018 Toyota Tacoma. Four are for the rear and two are for the front. Of the front two, part # TTOFTUN4 is designed for adding support when you put a snow plow on the truck and # TABSTOF is an active bump stop that cushions the shock when off-roading. A couple of the rear kits are designed to support the rear of the truck when either towing a trailer or adding weight in the bed. Use part # TTORTUN4 if your...
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  • Height of the Rubber Spring of the Timbren kit part # TTORTUN4 and # TORTUN4L
    I went out and pulled both the Timbren kit part # TTORTUN4 and # TTORTUN4L from our warehouse to measure them for you and found that they both sit exactly 3-3/4 inches tall.
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  • Height Of Timbren Springs and Vertical Wheel Travel Loss In 2019 Toyota Tacoma
    When installing any Timbren system on the 2019 Toyota Tacoma you should have about 1/2" to 1-1/2" between the frame and the spring after installation. You won't necessarily be losing wheel travel when you use a Timbren Rear Suspension Enhancement System on the Tacoma. I recommend either the # TTORTUN4 system if you have 4 leaf springs in the rear suspension or # TTORTUN4L if you have 3 leaf springs in the rear suspension. When you switch out the factory bump stops for the Timbren springs...
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  • Comparing the Timbren Suspension Systems TTORTUN4L and TORTUN4 for 2019 Toyota Tacoma
    The correct Timbren Rear Suspension Enhancement System for a 2019 Toyota Tacoma is part # TTORTUN4L if you have three leaves in the rear leaf spring pack or part # TTORTUN4 if you have four leaves in the rear leaf spring pack. Therefore, the main difference is in regards to fit. The Timbrens are going to do an excellent job of helping to reduce rear end sag/squat while loaded or towing. They also won't affect the unloaded ride quality and they are easy to install which makes them the perfect...
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  • Recommended Transmission Cooler And Suspension Enhancements For A 2011 Nissan Frontier
    I will first start out by addressing the additional transmission cooler you will want to help keep the transmission fluid temperatures at a safe level, while towing a 5,000 lb. trailer with your 2011 Nissan Frontier. As you mentioned, your Frontier is plenty capable of hauling this load, however, it is never a bad idea to aid your factory transmission cooler with an even larger one for optimal performance. I recommend looking at the Derale Series 8000 Plate-Fin Transmission Cooler Kit...
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  • Recommended Timbren Rear Suspension Enhancement System for a 2017 Toyota Tacoma with 4 Leaves
    For your 2017 Toyota Tacoma, I recommend using the Timbren Rear Suspension Enhancement System part # TTORTUN4 because you have 4 leaf springs. If you had 3 leaf springs then you would want to use the Timbren Rear Suspension Enhancement System part # TTORTUN4L. The bump stop attaches to the top of the leaf spring pack and makes contact with the bottom of the frame rail. If this distance has been altered with the leveling kit you have installed on your truck, then you will need to use increments...
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  • Timbren Rear Suspension Enhancement Recommendation for a 2016 Toyota Tacoma
    I checked with Timbren and for your 2016 Toyota Tacoma they recommend the part # TTORTUN4L as a confirmed fit and not the # TTORTUN4. I attached a review video for you to check out as well.
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  • Will RoadActive Suspension For 2019 Toyota Tacoma Give Smoother Ride Than Timbrens
    That's a good question, and the answer is pretty straightforward - yes, the RoadActive Suspension (RAS) is going to give you a smoother, less bumpy ride than the Timbrens for your 2019 Toyota Tacoma. Like you mentioned, the Timbrens do their job well due to the stiffness of their rubber springs, but that stiffness can also cause the ride to be uncomfortable or even jarring as there isn't much give to them. The RAS will absolutely remedy that while providing the same - or better - enhancement...
    view full answer...
  • Are There SumoSprings for a 2018 NIssan Frontier
    I do have an option but I just checked with Super Springs, the manufacturer of SumoSprings and they do not offer any kits for a 2018 Nissan Frontier. Instead, I recommend the Timbren Rear Suspension Enhancement System part # TTORTUN4L. The Timbren Rear Suspension Enhancement System is very similar to the SumoSprings Solo Custom Helper Springs in how they install and operate but the Timbrens will actually offer more support. The Timbrens also like the SumoSprings won't affect the unloaded...
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  • Timbren Helper Springs for a 2014 Nissan Frontier Desert Runner with Leaf Springs on Top of Axle
    Timbren helper springs # TTORTUN4L are designed to fit on 2014 Nissan Frontier 4x4 trucks that have the leaf spring stack on top of the rear axle. Take a look at the installation instructions I have linked for you for more on how they install. I have also linked a review video on these springs and a link to our informational article on Timbren springs.
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  • Will Timbren Rear Suspension Enhancement Fit 2010 Toyota Tacoma 4X4 Quad Cab Short Bed SR5 PickUp
    My technical contact at Timbren confirmed that the Timbren Suspension Enhancement # TTORTUN4 that you referenced will work well on your 2010 Toyota Tacoma because you previously added that fourth leaf spring. The difference between the # TTORTUN4 and the # TTORTUN4L which is designed for vehicles with three leaf springs is 1/2 inch so because you added the extra leaf you can use the original part you picked out. I have attached a FAQ article covering Timbren as well as the installation...
    view full answer...
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