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  1. Vehicle Suspension
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  3. Bump Stops
  4. Towing/Load Leveling
  5. Extra Heavy Duty
  6. Rear Axle Suspension Enhancement
THIS ITEM IS NOT A FIT FOR
2012 Keystone Hideout Travel Trailer
Timbren

Timbren Rear Suspension Enhancement System

Part Number: TTORTUN4
In Stock
$269.36
Retail:$316.90
You Save: $47.54
Vehicle Suspension
Not Confirmed to Fit

2012 Keystone Hideout Travel Trailer

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6,000-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 TTORTUN4 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TTORTUN4

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

6,000-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 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: 6,000 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 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.



TORTUN4 - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TTORTUN4 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

3752 reviews
5 Stars
(2989)
4 Stars
(478)
3 Stars
(119)
2 Stars
(73)
1 Star
(93)
6,000-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:

I have a 1991 Mazda B2600I 4x4. I would give this product a 5 star rating if it wasn't for the fact that it didn't exactly fit my vehicle as advertised. I had to modify things a bit to make it work. Other than that the product preforms as advertised as far as I can tell so far. I haven't really hauled any overly heavy loads yet but I have noticed the difference. Would recommend the product though you may want to call to double check the fit if you have an older make and model.



by:

Quick delivery & excellent product for those 3/4 ton truck owners who wish they purchased a 1 ton instead



by:

They worked great!



by:

I think that they are awful. I was told that I couldn’t return them. Upon me purchasing them you did not have the item I was specifically looking for and I spoke to one of your salesman who recommended these and said they were the same thing. Which they are absolutely not. So I would say I am totally displeased not necessarily for the product but for the lack of knowledge from the salesman don’t really know if the product is in good working condition because it’s not the product I was looking for. So now I’m stuck with something I can’t use.



by:

Seemed to work great.



by:

Easy to install and effective.



by:

correct parts, easy install



by:

very easy to install, very happy with the amount of weight they can handle. will be buying more.



by:

Just what I needed easy install delivered on time thanks for good products and service



by:

fast delivery and perfect fit



by:

Works well- as advertised!



by:

Easy install, works as advertised



by:

My second set due to buying a new truck. I consider these vital when towing a TT with my F150. They maintain a correct ride height and reduce sway dramatically. At the same time, they do not affect unloaded ride quality...easy to install too!



by:

Box could have been sealed better.Box was open ,not sealed with tape.



by:

Excellent product and service!



by:

Easy install, great ride with a load.



by:

easy to install have hooked to trailer yet to see how it helps



by:

Easy instillation. Functions great.



by:

Driving loaded is great! Highly recommend.
Driving empty is a little harsh/rough. They sit about 1" away from the axle empty and I think hitting bumps and they come in contact with the axle is where the jolt is.



by:

Great Product built like a Tank



by:

Really fast shipping



by:

Works great for heavy tongue weight conditions! But etrailer, c'mon man, you can't ship this in a retail box!!! USPS received the damaged box from UPS, and they had to tape it up for final mile delivery. Luckily everything was still in the box.



by:

Shipped quick, product looks sturdy



by:

These should help when pulling my travel trailer!



by:

good price and speedy delivery-perfect


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3752
Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

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    For sag from towing a trailer the best recommendation I can make is actually a weight distribution system. Suspension enhancement will help level your truck while towing. But the advantage to a weight distribution system is that it levels the vehicle by distributing the tongue weight of the trailer up to the front axle of the vehicle as well. This will help greatly with handling and braking, especially in an emergency situation. The best way to pick out a weight distribution system is...
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  • Recommendation for Fighting Sag When Towing with a 2010 Toyota Tundra and Weight Distribution
    Weight distribution (WD) systems actually take on the weight of any cargo behind the rear axle of the tow vehicle (your 2010 Toyota Tundra) as well as the tongue weight (TW) of the loaded trailer. This is why you are finding that your WD system isn't performing as well when you load down the bed of your pickup. For example, the Equal-i-zer # EQ37100ET has a TW range of 600 lbs - 1,000 lbs. If you were using this system and the 709 lb TW of your trailer plus the cargo behind the rear axle...
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  • 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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  • 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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  • 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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  • Towing Capacity Limits for a 2010 Toyota Tundra
    As long as you stay under the 10,300 pound mark you should be fine. Currently your trailer and gear estimate would weigh 9,100 pounds. Take a look at the rig when the trailer and truck are fully loaded as though you were ready to hit the road. If the Tundra is sagging in the rear, I would suggest using some sort of suspension enhancement system. They spread the load to to more springs so there is a total of 4 points on the axle that weight rides on. Timbren makes hollow rubber springs...
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  • Recommended WD Hitch For A 2023 Airstream Basecamp 16X
    Hello Michael. So, we do not sell the Andersen WD hitch here, but it is something I am familiar with. I also just spoke with an associate of mine who has some experience using the Andersen WD hitch so I can definitely give you an honest opinion on it. What they say about it being easy to set up is true. Other than that, they really are not that great. The components seem flimsy, and it does not provide good sway control or weight distribution. I cannot say it is something I would recommend...
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  • What Is The Difference Between Timbren TABSOSR And TTORTUN4?
    Hello Jhon, thanks for reaching out. Both the Timbren kits you mentioned are going to fit the 2013 Toyota Tacoma. The difference is the application and the weight capacity. The # TABSOSR are intended for off-road applications and are rated for 3,600 lbs. The # TTORTUN4 are intended for typical on-road towing hauling application and they are rated for 6,000 lbs. What are you hauling with you Tacoma? A Camper or trailer? Reply on this page.
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    As long as you have a set of fifth wheel rails installed in the bed of your 2016 Toyota Tundra the Andersen Ultimate Connection part # AM3200 can be installed and then attach to your fifth wheel pin box. For a set of rails confirmed as a fit for your 2016 Toyota Tundra you'd want the part # RP50084-58. This is a custom fit rail kit that would minimize drilling when compared to a universal one.
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  • SumoSprings or Timbren Suspension Enhancement For a 2017 Toyota Tacoma Pulling Car Hauler Trailer
    I recommend the Timbren Rear Suspension Enhancement System # TTORTUN4 over the SumoSprings Solo Custom Helper Springs # SSR-612-47 for your 2017 Toyota Tacoma TRD Sport. The Timbrens have a much higher weight capacity at 6,000lbs versus the SumoSprings at 1,000lbs. This will give you a better ride level and stabilization when you are towing your car hauler. A Equal-i-zer Weight Distribution System # EQ37100ET may be a better option if you only need the suspension enhancement when you are...
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  • Recommended Timbrens and Heights for a 2015 Toyota Tacoma w/ a 4 Leaf Spring Pack
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    The Timbren Active Off-Road Bumpstops part # TABSOSR which are a fit for a 2007 Toyota Tacoma are designed so that there is more space between the spring and frame to allow the suspension to articulate freely when off-road. If you're looking for a spring which is closer and provides support sooner you would instead want to go with the Timbren Rear Suspension Enhancement System part # TTORTUN4 which is designed to sit around 1/2" to 1-1/2" from the frame. If the truck has been lifted you...
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  • Comparing Timbren and SumoSprings for The Rear Suspension of a 2021 Toyota Tundra
    The main difference when comparing Timbren and SumoSprings for suspension enhancement is going to be the weight capacities. Timbren uses hollow rubber springs that is able to support more weight but they can cause a firmer ride. The SumoSprings are made of a durable microcellular urethane that will progressively increase capacity as the spring is compressed. This will offer a smoother ride as the springs will better absorb the shock but they do not offer the capacity and stability of the...
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  • Recommended SumoSprings And Timbren Jounce Springs For A 2021 Grand Design Reflection 337RLS
    Hi Ryan, If your leaf springs sit on top of your axles then you'll need the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # SS26MV. If your leaf springs sit below the axles then you'll need the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # SS33HR. Timbren does offer a few different options for leaf spring suspensions but you won't be able to use both the SumoSprings and Timbrens because they both mount in the same spot. If your leaf springs sit on top...
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  • Jounce Bumper Helper Spring Options for 2021 Toyota Tacoma
    Some 2021 Tacoma were equipped with 3 leaves in the springs, some with 4, so you'd just need to take a quick peek at what you have to determine which Timbren kit you'll need, as I have no way to look up how your truck is equipped. For a 4WD with 4 leaves in the spring pack, use # TTORTUN4, for 3 leaves use # T72FR. For 2WD vehicles with 4 leaves, use # T62FR or # T72FR for 3 leaves. This being said, the Timbren systems offer much more support than what you'd actually need to counteract...
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  • Will RoadActive Suspension Enhancement Kit Fit a 2018 Toyota Tacoma
    Sorry to hear about your dissatisfaction with the Timbren # TTORTUN4 on your 2018 Toyota Tacoma. They are hollow rubber springs and can create a bumpy ride when you have a load on the truck and go over speed bumps. As for the RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS4514-SAT, which is the right kit for your '18 Tacoma 4WD with the axle below the leaf springs, your ride will not be as stiff as with the Timbrens. The RoadActive Suspension is really a full system which...
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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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  • Recommended Timbren Suspension Enhancement System for 2010 Nissan Titan
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  • Timbren Suspension Enhancement System for 2018 Toyota Tundra 4WD
    The Timbren Rear Suspension Enhancement System # TTORTUN4 is a great SES that fits your 2018 Toyota Tundra. The Timbren line of SES is really popular and there are several models available. The # TTORTUN4 features heavy duty rubber springs with a 6,000 lb weight capacity. The Timbren Active Off-Road Bumpstops # TABSOSR features a lighter duty rubber spring with a 3,600 lb weight capacity. Both products fit your vehicle and install in the same way, but the # TTORTUN4 is better if you expect...
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  • Would Weight Distribution Hitch Need to be Adjusted When Adding Timbrens to 2021 Toyota Tundra
    Really good question, and you need to readjust your weight distribution system when installing Timbrens on your 2021 Toyota Tundra; the correct fit for those are the following: - Timbren Rear Suspension Enhancement System # TTORTUN4 You'll need to readjust your hitch because the # TTORTUN4 will engage and help level your '21 Tundra when you have a trailer hooked up. Just the Timbrens alone though won't get you completely level or sway control, so using them with the TruTrack is really...
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  • Recommended Suspension Enhancement System For My 2019 Toyota Tundra With A 6 Inch Lift
    When installing suspension enhancement on your 2019 Toyota Tundra that a 6 inch lift The RoadActive Suspension # RAS4611TD will work for you as long as the leaf springs are stock, if not The Timbren Rear Suspension Enhancement System # TTORTUN4 will work you if you use the Spacer Kit for Timbren Suspension Enhancement System # T68MR. The Timbren System has a 6,000 pound capacity. The hollow rubber springs sit above the rear axle to help stabilize and level your Toyota Tundra. They also...
    view full answer...
  • Recommended SumoSprings for a 2022 Toyota Tacoma 4WD
    For your 2022 Tacoma you are going to want the SumoSprings Solo Custom Helper Springs item # SSR-612-47. These attach directly above the leaf springs so the block between your axle and leaf spring won't affect the springs function. I have linked the instructions below along with a review video.
    view full answer...


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