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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
2007 Yamaha Wolverine
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

2007 Yamaha Wolverine

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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
  • Rear Axle Suspension Enhancement
  • Extra Heavy Duty
  • 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

3771 reviews
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:

Fast shipping, just what I I ordered!



by:

Awesome investment. Benefits of airbags without the price or the hassle.



by:

I'm very happy with the fast service. Timbren makes quality parts and now my problems are solved. I get a smooth ride and the truck does not sag . Thank you



by:

Very quick delivery, earlier than I expected. Easy to install. Just what was needed for rear weight support when pulling a trailer.



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:

Worked excellent for trailering.



by:

Easy to order on line received my order in less then a weeks, That's what I'm talking about didn't have to leave the house.



by:

Exactly as advertised



by:

Easy to place on vehicle, haven't put tailer on yet, but clearance is 1/2 to 3/4 inch, should be perfect.



by:

Great service and quick shipping



by:

Product reuses factory mounting bolts which when installing on a pickup with more than a few years old plan on buying new.



by:

Great Product, arrived quickly and packaged well.

Will be buying from them in the future.



by:

Received in a timely manner and packed nicely. Instructions clear and went on easily.



by:

Awesome, leveled me right up, perfect.



by:

Levels out my F150 when towing. Super easy to install.



by:

Easy to install. Works as advertised. Etrailer rocks!



by:

Just received them just install them looks like they work great etrailer is always right on spot



by:

Very easy installation!



by:

awesome sevrice EVERY time ive worked with these guys, really REALLY fast too... good guys



by:

I bought a set for my F250 and like them so much that I bought a set for my F350. It prevents the vehicle from sagging in the rear when hauling towing heavy objects. Makes for a smoother and more stable riding experience.



by:

Great product. Great idea and works as it should. Didn't give a 5 star because the mounting bolts were a little on the cheap low quality side. But other than that no complaints



by:

Installed a set on my truck and liked it so much I ordered this set for my Dad's truck.



by:

Parts came in sooner than I thought. Instructions were very good and easy to install. Took 15 to 20 to install GREAT PRODUCT.



by:

Worked great. My Tahoe no longer says in the rear. Can’t even tell a difference when I hook my trailer up.



by:

Awesome product took 30 minutes to install this product will save my springs and shocks during heavy towing.


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3771
Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Best Way to Prevent Sagging Suspension When Towing a Trailer
    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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  • Will The Timbren TTORTUN4 Fit A 4 Wheel Drive 2023 Toyota Tacoma?
    Hi Duane! As long as your 4 wheel drive 2023 Toyota Tacoma has 4 leaf springs in the rear, the Timbren Rear Suspension Enhancement System # TTORTUN4 will indeed fit. If you do not have 4 leaf springs, just let me know and I can find another option for you. What are you going to be towing? And how often? These can be a bit harsh when you are unloaded. They do a very good job when you are loaded though.
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  • Timbren Rear Suspension Enhancement Recommendation for 2023 Toyota Tacoma
    Hey Fernando, I'd be happy to help you pick out the correct Timbren rear suspension kit for your 2023 Toyota Tacoma TRD that will be towing a trailer. Really it comes down to two options. You would want the part # TTORTUN4L for if you have the 3 leaf spring setup in the rear suspension or the part # TTORTUN4 if you have a 4 leaf setup. I don't have a way to look up how many leafs are in your spring pack otherwise I would. The other options are severe service which means it's going to be...
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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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  • 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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  • 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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  • 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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  • Can Andersen Ultimate Connection Part # AM3200 Be Used with 2016 Toyota Tundra
    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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  • 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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  • Suspension Enhancement Recommendation for 2015 Coachmen Freelander 22 ft Class C
    Suspension enhancement would be your best option since you mentioned having an aluminum frame trailer. That we've found there isn't an aluminum frame trailer manufacturer who will state that you can use weight distribution with their trailers. They just put a different kind of stress on the trailer frame. So the best option I have would be the SuperSprings part # SSA22 which installs on the leaf spring you have now and gives you 2,200 lbs of additional suspension support.
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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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  • Will Timbrens TTORTUN4 Fit 2016 Toyota Tundra
    Hey Ralph, Yep, the Timbren Rear Suspension Enhancement System # TTORTUN4 will indeed fit your 2016 Toyota Tundra.
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  • Should Timbren's Be Engaged w/ a Weight Distribution System?
    Yes, this is normal. The Timbrens will engage first when you hook up the trailer and the weight distribution hitch will then work with the remaining sag. Just make sure you're not overloading your truck's tongue weight capacity and the weight distribution system is set up correctly. Any gear in your bed will add to the trailer's tongue weight.
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  • Recommended SumoSpring Jounce Springs For A 2021 Jeep Gladiator Rubicon
    Hey Erwin, I always recommend matching the enhancement to the weight you plan on towing while also factoring in your vehicle's payload capacity to avoid affecting your unloaded ride quality. With the payload capacity of your Gladiator being only 1,200lbs and the camper weighing in at 1,000lbs the SumoSprings Solo Custom Helper Springs # SS42XR (1,400lb capacity) would be more than enough to help support your suspension with the camper loaded in without being so stiff that it becomes uncomfortable....
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  • What Suspension Enhancement do you Have for My 2019 Dodge Grand Caravan to Help with Sag?
    Happy to help you get the parts needed to eliminate that rear sag on your 2019 Dodge Grand Caravan. For suspension support, I recommend the Timbren Rear Suspension Enhancement System # TDVRRT. These install inside the rear coil springs and provide a maintenance-free solution that helps keep your vehicle level when towing or carrying a heavy load. As for a weight distribution hitch, it’s not that you can’t use one with a pop-up camper it really depends on your trailer’s setup. The key questions...
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  • Recommended Timbrens and Heights for a 2015 Toyota Tacoma w/ a 4 Leaf Spring Pack
    Hey Josh. The Timbren Rear Suspension Enhancement System item # TTORTUN4L has an overall height of 4.6" including the bracket. Timbren recommends a 1" gap between the spring and where the old bump stop hits. The Timbren item # TTORTUN4L is designed for the 2015 Toyota Tacoma with 3 leaf pack springs in the rear suspension. The Timbren item # TTORTUN4 you mentioned have an overall height of 5" so I completely agree with you. Do you tow with your Tacoma? If not why are you wanting to...
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  • Which are Better for a 2017 Ram 1500, SumoSprings or Timbrens?
    Hey William thanks for stopping in! Personally I'd go with SumoSprings # SSR-610-54 over Timbrens. SumoSprings are a progressive spring which means the initial engagement is much softer compared to Timbrens which ultimately gives you better ride without sacrificing support. These particular springs will work with 4WD models, has a 2,800 lb capacity, and are maintenance free since there is no air lines or air pressure to monitor. If there is anything else I can do for you, please feel...
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  • Spacer for SumoSprings
    Hi Mustafa; SuperSprings does not offer additional spacers for the SumoSprings. You might be able to get them to send you one if you ask but it will also require a longer bolt. The Timbren SES # TTORTUN4 is the better solution for lifted applications since they have a spacer kit # T93AV available to make up the difference and close up the gap.
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  • How Much Space Should There Be with Timbren Active Off-Road Bumpstops On 2007 Toyota Tacoma
    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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  • 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...
    view full answer...
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