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FITS 2000 Toyota Tacoma
Timbren Rear Suspension Enhancement System

Timbren Rear Suspension Enhancement System

Our Price: $252.45
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Vehicle Suspension
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2000 Toyota Tacoma

excluding Pre-Runner


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Call at 1-800-940-8924 for expert service. We are your Toyota vehicle suspension experts, and offer a great price. carries a complete line of Timbren products for your Toyota Tacoma 2000. Timbren Rear Suspension Enhancement System part TTORTAC4A from Timbren can be ordered online at Complete vehicle suspension installation instructions and technical support.
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2000 Toyota Tacoma - Timbren Rear Suspension Enhancement System

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

6,000-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your Toyota Tacoma. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.


  • 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
  • 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
  • Limited lifetime warranty
  • Satisfaction guarantee

An example of sag on a truck's rear axle under a heavy load. The Timbren Suspension Enhancement System levels the vehicle.

When hauling heavy loads in the cargo area or by pulling a trailer, you will often see the rear of the vehicle sag while the front end rises. In these cases, the rear axle is handling not only the weight of the cargo, but more of the vehicle's weight as well. Because less weight is on the front axle, the front tires are making less contact with the road. Overall vehicle handling - traction, steering, and braking - is negatively affected. The resistance from Timbren's Suspension Enhancement System works with the vehicle's factory suspension to keep the vehicle level and improve your driving performance.

Diagram of the Timbren spring installed

The Timbren system has a vehicle-specific bracket that will be 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 one inch 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 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 provides increased resistance, stiffening the suspension and keeping the vehicle level.

Timbren suspension system works to prevent body roll

Each hollow rubber spring works independently to support the driver's or passenger's side of the 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 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 helping 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 passing of a semi) because the movement from the trailer is not transferred to the vehicle. This also works to make the sway subside quicker.

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 as the rubber springs work to prevent bottoming out on rough roads.

Compared to the competition:

Timbren's suspension enhancement systems are much easier to install than air springs - no air hoses are needed to be run, no compressors or gauges to hook up, and no manual adjustments necessary. The rubber construction causes Timbren's springs to be more elastic than similar products constructed of micro-cellular urethane. More elasticity allows for a more comfortable ride because the rubber has more travel.

TORTAC4A - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TTORTAC4A Installation instructions

Customer Satisfaction Score:

Customer Reviews

Timbren Rear Suspension Enhancement System - TTORTAC4A

Average Customer Rating:  4.7 out of 5 stars   (4932 Customer 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.


Having purchased a cargo trailer, I thought it might be wise to beef-up the rear suspension on my 2000 Tacoma. I found the Timbrens on etrailer, and it sounded like they might work well, so I purchased a set and installed them. According to the instructions, there should be about a 1/2" gap between the top of the springs, and contact with the bottom of the Timbren - unless you have a CAP on the truck! The gap pretty much evaporated because of the fiberglass Leer cap. So, I'm getting contact a lot of the time. Result is, my ride has become stiffer than I'm used to, but not so much that it bothers me. Like my wife said, " It's a truck! Hello!!" (OK, I'm satisfied with the product.)

Keep in mind that the gap Timbren refers will diminish as the springs wear. Since the truck is a 2000, it probably has some miles on it and if it has hauled heavy loads in the bed or has pulled a trailer, then the leaf springs may just be worn.
-- Etrailer Expert Patrick B - 12/18/2013
A year later and 5,304 miles pulling the trailer, I think the Timbrens are a good investment. With a typical pull of 2,555 lbs of trailer and load, and approximately 300 lbs of tongue weight, Im finding the truck actually rides better than it does with no load. And, theres no maintenance whatsoever!
DaveInSedroWoolley - 01/12/2015

2001 ToyotaTacoma

Just what the truck asked for...

a Farrier, I carry a full workshop in the bed of my truck 24/7. I drive a 2001 Toyota Tacoma 4x4. After a couple months I redid the entire front and rear suspension and added heavy duty rear leafs. After about a year of driving and also adding more tools the truck began to sag a little bit. Ofcourse, the first thing anyone suggested was “airbags” but they didn’t know the use of the truck or where the truck goes from day to day. Being a Farrier, I travel on everything from paved freeways to down and dirty “4lo” back roads. I needed a maintenance and care free system that would allow for over extension and hold the extra weight of my tools and sometimes even a trailer. I did a ton of research and even talked to the Technician Staff at each company. I ultimately decided to go with Timbren SES Kit. It’s easy to install, maintenance free, free floating, and has the best warranty in it’s category. Since I have a custom setup (Ubolt Flip Kit from AllProOffroad) I had to design and build some landing pads to allow for an “interference free” contact with my system. After the first day of working, I am COMPLETELY satisfied with its performance and how my truck feels and drives.

As for ”Etrailer” I am very happy with all the information and excellent customer service. I received my parts 2 days before it’s orignal date which makes me super Happy!


I own a 2002 Toyota Tacoma crew cab, with a leer topper, I work in construction and carry my tools all of the time.

I’m very pleased with it and it’s been the best I ever had.
the bolt should be galvanized or stainless, the bolt is getting a bit of rust after one year.

Even then I would recommend this.



This worked great and was easy to install. No impact to driving quality when unloaded. Does make a nice improvement to ride quality when loaded and the rear end of the truck does not sag under the load.

One issue is the bolts were about 1/2" too short, the nylock washer barely makes it onto the threads.


The overall product design and usage has been excellent. Carrying heavy loads is easy and my '01 Tacoma handles bumps and ranch roads much better loaded down. I'm running a 3-in lift so there is no contact from the rubber springs and unless I'm heavily loaded, works great for off-roading. I had to grind the corner off one of the mounting plates to make room for my brake line,and get creative about starting the nuts inside the rubber springs but it was well worth it.

2004 ToyotaTacoma

Installed these on my 2004 Tacoma 4 door, 4WD. They were great with a trailer on back and handled the load great. Without the load of a trailer it is like riding a hard tail Harley. In the process finding something different to help the sagging springs.

The Timbren Aeon springs are meant to be used on a suspension thats in good repair. Normally, the vehicles ride will be completely normal until the rear suspension is loaded either from cargo or by the tongue weight of a trailer, at which time the suspension will compress far enough that the Timbren springs come into play.
-- Etrailer Expert Mike L - 11/28/2018

1993 ToyotaTacoma

This is a great product for when i am towing. It really beefs up the rear suspension and prevents the proverbial Tacoma sag. However, since it is not easily removable, it stays in place all the time. It makes the ride rough, and you can feel every little bump. No give. I knew this going in, but I think air shocks would have been a better decision. Overall happy with the performance.


This product has worked extremely well. Ride is a little rougher but very stable when towing our teardrop and kit or hauling tools to worksite. I do have experience with airbags but feel a more stable ride in corners, etc with this product

2004 ToyotaTacoma

Haven't installed yet but the customer service and delivery was excellent so far. I called Timbren prior to ordering to double check I was selecting the correct product for my 2wd Tacoma, which actually needs the 4wd drive version the the Timbren bumpstops bc of the TRD model. Timbren immediately picked up the phone and quickly assisted me.


Very straight forward. Initially I was given a date that was a little farther out than I had planned. Was offered a similar product that could be shipped immediately. I appreciate that attitude. Offer a solution to the problem. I chose to wait. Product showed up as they said it would.
Excellent service.


These are fantastic. All Timbren Suspension Products I have used work great and noticeably improve handling and performance.


Great product, great service. No more blinding oncoming traffic when I’m loaded or pulling my boat. Truck stays nice and level


Timely shipping! Project is completed, Thanks.



1999 ToyotaTacoma


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

I was back and forth between Timbren SES and airbags. Everyone in forums were very biased toward air bags and very opinionated on the Timbren SES. Yet I could find one instance in which someone tried the Timbrens, were dissatisfied and then switched to air bags. I called etrailer, Jamie recommended this product to me for my application. Installation on a 20-year-old truck had me nervous, I live in the Midwest and have a lot of salt. Installation was a breeze, and I have a B&W 5th Wheel Hitch (turnover gooseneck ball). This made the install a bit more challenging simply because I had a large bolt through the frame directly above my bump stop nut. If you do this install with the B&W Hitch, get a set of gear wrenches, or borrow a buddies 15mm and 9/16 wrenches. You need the 15mm to remove the factory nut and the 9/16 to install the Timbrens. I sprayed wd40 two nights in a row prior to installation to make sure I had good penetration of oil - I didn't break a bolt or a knuckle. I recommend installing the Timbren spring to the mounting plate, then install the mounting plate with Timbren to the truck. I didn’t need to remove my wheels or my spare, I jacked up the back under the hitch, used jack stands and let the weight of the axle separate the rear end from the truck giving ample room for the installation. After installation, I checked the clearance of the TImbren from the axle and had 1 inch of clearance. I installed my 1200-pound pickup camper and the springs just started touching the axle. I have a 21-foot fiberglass boat and seen about a 1/4-inch drop after I connected it to my truck. These things work and best part is – no maintenance and no danger of shifting weight if an airbag lost pressure or was punctured/damaged. I hunt with this vehicle and drive through thick brush and timber, I feel airbags wouldn’t hold up with the abuse I put my truck through. The Timbren SES system took the squat out of my truck and made the drop from the connection of my heavy boat hardly noticeable. Thank you etrailer, great experience as usual!


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

The hardest part was the de-installation of the factory bump stop. Installation of the Timbren’s was simple and easy.

My truck is 2008 F250 V10 Crew Cab 4x4 with factory overload springs. I have a B&W fifth wheel & gooseneck hitch installed. I did notice the difference in towing my 34’ fifth wheel trailer. The ride and handling was improved. I would recommend them.


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

About a 1/2 inch difference in gap at the bump stop perch but still within parameters. Truck sits perfect with trailer attached. Haven’t towed yet. After towing if they perform like they should will upgrade to a 5 star. Easy to install, definitely needed 2x4 and jack. 2011 Silverado ext cab with 30 ft Genisis 5th wheel.


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

They may be a great product but they did not work on my 22 f350. Even with the spacers provided they would not make contact with the trucks axle even with a heavy slide in camper. If I am going to keep them I’ll have to make welding modifications to extend the bracket so it will work on my truck model pictures with and without the camper loaded.

I would like to update my review to say that Timbren came through and made my application work by sending me the right parts so my truck doesn’t squat and it handles my truck camper much better. Timbren has great customer service

I see what youre saying here. From the photos, it looks like you have everything set up the way it should be. 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.
-- Etrailer Expert Brooke M - 12/29/2022


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

I installed Timbren on front and rear of Georgetown motorhome. The install was easy and the improvement in overall handling was noticeable. No more bottoming out on bad roads, and a reduction in sway or lean in and out of turns. Worth the money, especially in conjunction with my other bolt on upgrades. Safety steer, Rear sway bar, and Rear trac bar


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

Haven’t had it on long, but so far so good. 1999 F350 dually. Bolted up nicely. Total job took 10 minutes. Have hauled two gooseneck loads of hay and truck drives SO much better. Nice and level. Money well spent so far.


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

They definitely support and did lift my 2014 toyota tundra up about 1.5 inches.
This application with my weight has trunk riding on the cushions all the time.
That has teavel and bounce issues that do make some driving situations interesting.
I may go ahead and replace with airbags but for now support things well!


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

The Timbren rear suspension enhancement system helped with the truck swaying side to side when the slide in camper is on the truck.
The photos show right and left rear with Timbren’s installed (2 photos), with slide in camper on the truck (2 photos) and when the camper was removed (2photos).


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

One of the timbrens appeared to be installed once and removed. Box said it was 2018 on it.

The second spring does look rough and I will have our Customer Service team reach out to you. I am not sure what the 2018 refers to however I know that it is not a manufacturing date. I checked and we have had recent stock checked into our warehouse. We do not have any remaining stock from 2018.
-- Etrailer Expert Jenny N - 01/26/2023

Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • How Much Will Timbren Rear Suspension Enhancement TTORTAC4A On 2000 Toyota Tacoma Compress?
    I reached out to my contact at Timbren and the Timbren Rear Suspension Enhancement System # TTORTAC4A you were looking at for your 2000 Toyota Tacoma will not hardly compress at all until you reach 4800lbs on the rear suspension. After 4800lbs you will start to experience some sagging, and if you go past 6000lbs you will experience sagging of around 2-3". Since your truck does not have a payload rating of over 4800lbs, you shouldn't notice hardly any sagging. I included a video of the...
    view full answer...
  • Replacement Bolt For Timbren Suspension System # TTORTAC4A on 1999 Toyota Tacoma
    The Timbren Rear Suspension Enhancement System # TTORTAC4A for your 1999 Toyota Tacoma uses 4 FHSCS 3/8" x 1-1/2" fine thread UNC grade 5 bolts. The Timbren part number F12063-653 can be ordered from Timbren if you want the exact part from the manufacturer as we currently do not carry this as a replacement part.
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  • Recommended Rear Suspension Enhancement for 1998 Toyota Tacoma 4X4
    The Timbren Rear Suspension Enhancement System # TTORTAC4A that you referenced is confirmed to fit your 1998 Toyota Tacoma 4X4. This jounce-style spring system will work great on your truck and is designed to handle exactly the kind of load you are putting in the bed, and resolve the exact issues you are experiencing as a result of this load. These 6,000 pound capacity springs will provide the needed additional support for the truck's rear suspension to help eliminate sag and increase stability...
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  • How Tall are the Springs in Timbren Helper Spring Kit TTORTAC4A for a 2004 Toyota Tacoma
    The helper springs in Timbren kit # TTORTAC4A are 5-1/8 inches tall by themselves. The overall height of the whole assembly will be a little taller. Does your 2004 Toyota Tacoma have a suspension lift?
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  • Timbren Rear Suspension Enhancement System for a 2003 Toyota Tacoma Pre-Runner
    The Timbren Rear Suspension Enhancement System part # TTORTAC4A is a confirmed fit for the Pre-Runner edition of the 2003 Toyota Tacoma and will work well for you. The Timbren's will maximize safe load carry capacity (up to 6,000 lbs), improve stability, and increase the wear life of your existing suspension components.
    view full answer...
  • Are There Air Bags for a 1991 Toyota Pickup
    I do have an option for you but we don't offer air bags for a 1991 Toyota Pickup. Instead, I recommend upgraded jounce bumpers like the Timbren Rear Suspension Enhancement System part # TTORTAC4A which offers a bolt-on fit and works well to reduce sag while towing or hauling. They also don't require maintenance like air bags do.
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  • Rear Suspension Enhancement Recommendation for a 1995 Toyota Tacoma
    For your application with an extra leaf spring already installed on the 1995 Toyota Tacoma, I would go with the Timbren Rear Suspension Enhancement System, # TTORTAC4A. It will not affect the empty ride of the vehicle, the springs get more rigid under load for more support, they are easy to install, and they are very cost effective. Since you will be on a lot of back roads, the added bonus of these springs acting as additional shocks will help out with ride quality as well. I have included...
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  • What Suspension Kit to Correct Sagging Rear End on 2002 Toyota Tacoma During Occasional Towing
    As you noted there are several different types of rear axle suspension enhancement products for your 2002 Toyota Tacoma: air-springs, rubber bump-stop springs and helper leaf springs such as the Super Springs # SSA18. Air-spring kits are more complex to install and require regular checks to maintain their required minimum pressure, but offer adjust-ability to suit changing tow and cargo loads. Rubber springs are not adjustable but do offer progressive resistance as the load increases,...
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  • Rear Suspension Enhancement Options for 2004 Toyota Tacoma 4X4 Double Cab with Camper Shell
    There are several types of rear suspension enhancement kits available for your 2004 Toyota Tacoma 4X4. These include adjustable air springs, jounce-style rubber or urethane springs and helper leaf springs. The link provided will show you all available rear-axle suspension kits for your 2004 Tacoma 4WD. These vary in price and installation complexity. Note that none of these products will increase the weight-carrying capacity of your vehicle. Air-spring kits are more costly and complex...
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  • Which Timbren Kit Fits 2004 Toyota Tacoma
    Suspension enhancement in general does not cushion the ride quality to make it softer. It if anything will always make the ride a bit rougher as it's stiffening up the suspension to reduce sag. The Timbren kit part # TTORTAC4A is a fit for your 2004 Toyota Tacoma and would help reduce sag in your suspension when towing but would not really smooth out anything. Since you have a lift kit you'll also need a spacer part # A25723-90AH00 for every inch of suspension lift your lift kit provided.
    view full answer...
  • Timbren Suspension Kit Recommendation for 2002 Toyota Tacoma
    The Timbren kit part # TTORTAC4A would be what you would need.
    view full answer...
  • Best Rear Axle Suspension Kit for 1998 Toyota Tacoma 4x4 SR5 Extended Bed
    The Super Springs Custom Suspension Stabilizer and Sway-Control Kit you referenced, part # SSA7, is a fit for the 2-wheel-drive non-Pre-Runner version of the 1998 Toyota Tacoma, but this kit will not fit your 4X4. A comparable product from Super Springs that will fit the 4WD non-Pre-Runner is part # SSA18. This bolt-on kit installs above your factory leaf springs without drilling required. Helper leaf springs like these are a good choice for frequent towing or hauling of heavy loads. They...
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  • Recommended Suspension Enhancements for a 2000 Toyota Tacoma TRD SR5 4 Wheel Drive
    The air spacer kit like # F2366 is a necessity and allows air springs like # F2304 to be installed on vehicles with 2-inch lift. A union T-fitting # F3025-1 will route two incoming air lines into one outgoing line or splits one incoming air line into two outgoing lines. You can use with 1/4 inch push-to-connect air lines. Adding air bags like # F2304 will help maintain even load distribution with air pressure and leveling off-center loads. Another suspension enhancement option you...
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  • Lift Spacers For Timbren Suspension Enhancement On a 2002 Toyota Tacoma
    Due to the design of the Timbren Rear Suspension Enhancement System # TTORTAC4A on your 2002 Toyota Tacoma the screw that would normally sit in that position is welded on as you do not have access to the head of the screw when it is installed on your Tacoma. You have a couple options to get your Timbrens to function properly on your Tacoma. First you can drill out the welds and have longer screws welded in their place. This would allow you to use the 1" Spacers # A25723-90AH00 or 1/2"...
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Can Timbren Suspension Kit Install on 2003 Toyota Tacoma with 2.5 inch Lift
    Timbren does make spacers like the part # A25723-90AH00 for a 1 inch spacer and # TA25722-90P00 for a 1/2 inch spacer which you can use to take up extra space created by lift kits so that you can still use their suspension enhancement kits like the # TTORTAC4A that you referenced. You'd need to use an amount of spacers that takes up the added distance created by the lift. So in this case you'd need two 1-inch spacers and a 1/2 inch spacer per side of the vehicle.
    view full answer...

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