Timbren Rear Suspension Enhancement System
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1986 Chrysler LeBaron
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1986 Chrysler LeBaron
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Heavy loads and trailers can make the rear of your vehicle dip and your headlights point skyward. The Timbren Rear Suspension Enhancement System uses 6,000-lb-capacity Aeon hollow rubber springs that mount above the rear axle to hold things level. As weight increases, the springs get stiffer, keeping the truck from squatting and improving steering, braking, and overall control when hauling or towing.
Rough pavement, potholes, and uneven terrain can make a loaded ride feel harsh. These hollow rubber springs act as built-in shock absorbers that cushion bumps before they reach the cab. The extra elasticity of the rubber provides more travel than microcellular urethane alternatives, so you get a smoother, more stable ride when carrying heavy gear or pulling a trailer.
When your load isn’t perfectly centered or a gust of wind hits, each Timbren spring reacts on its own to keep you steady. The independent left-and-right action evens out off-center loads and cuts down body roll when turning or swerving. That keeps both tires planted so you feel less sway from side to side on highways or curvy roads.
There’s no air lines, compressors, or gauges to mess with here. The vehicle-specific brackets replace your factory bump stops using included hardware—no drilling required. Once bolted in place, the system automatically engages when weight is added and stays out of the way when unloaded, giving you reliable support without any upkeep.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
Everything came on time and excellent s ervice
Super easy to install!
Next best option to air shocks (not available for the Tacoma) or bags. Almost like bags you don't need air for. A great pair with a distributing hitch setup
Product was shipped fast . Only took me 15 minutes to install. Can’t wait to try it out. Should make for easier towing. Thanks etrailer
Did the job!!!
These are a must on a Toyota Tacoma with a canopy on or if your carrying regular heavy work equipment.
Great product great price. Thanks for your help.
Heath
2/21/2026
Still love it great when you’re towing heavy loads
Have these on a Tacoma and my F250. They definitely help a lot supporting the rear of the truck and keeping it from squatting as much when hauling or towing. Also helps control body roll, and sway. Was torn between these and an airlift bag setup as they have gotten pretty close in price, but went with these for simplicity. I’m happy with them.
No more bottoming out when I go over bumps in the road. I was able to install them without removing the tires! My truck feels a lot stiffer when I drive. I am also more level when towing my camper. Great product!
UPS lost the box, but one e-mail to etrailer and another was on its way. Installed easily and is performing just as I'd hoped. Truck is more level and the ride is a little stiffer so towing is much better.
Just finished installing the TTORTUN4 Suspension kit on my Tundra. It took me, with limited mechanical ability, about an hour to install and was a simple and easy installation. My truck loaded with tools, a construction canopy, and heavy bed-slide sits up in the back like its unloaded, rides great, and handles so much better! I'm super pleased! Thanks so much!
These are great! Dont change the ride at all when not in use and make towing my 7000lbs trailer so much more comfortable! Tow with confidence. Easy install took ten minutes with my buddy's lift. Could have been done easily on the ground too. Improves handling and ride when towing
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!
20 min install tops. Took more time retorquing the nuts after loading. Couple tips: only remove the two rear nuts on each u bolt to slip out the old bump stop to replace with the timbren. Go ahead and spray those nuts with pb blaster or wd 40 to help ease removal. I used a breaker bar so it was no problem. I would suggest that once you have the timbrens in place, I would jack up the rear under the receiver hitch (I used wood blocks) and slip your socket and extension back into the bump stop to retorque the 17mm bolt. I also went ahead and retorqed the nuts once I hooked up trailer. As far as towing now, wow what a difference. Virtually eliminated all front axle hop from road dips making for a much more confident and stable ride. 26' coach, 4900# dry. Pics are unloaded and then loaded.
These bump stops are great and very easy to install. They help keep my 2019 Tacoma leveled when towing my 5,000lbs trailer. I’m very happy and recommend them if you are planning to tow a trailer with your Tacoma. My only complaint is that sometimes when driving on old or uneven roads, they will make the ride very bumpy as if you had a sports suspension.
I've had these on my '16 Tacoma for a year now. When the truck bed is empty, the ride is harsher than before, but not intolerable. When I'm loaded up for hunting (lots of heavy gear, maybe an elk, plus towing a pop-up camper), it's perfect--never bottoms out like it used to. I keep 120 lbs. of sand back there all winter for added traction in the snow, and that helps to smooth out the ride a bit. This photo with sagging rear was BEFORE the Timbrens--now it rides level.
This is an amazing product. Took about 30 minutes total to install on my Toyota Tundra. That includes setting up and clean up. I pull a 20 foot flat bed trailer and a 30 foot travel trailer. This product really helps me when I do encounter bumps and uneven lanes. Helps keep my rig secure on the road and doesn’t interfere with normal everyday ride. I would definitely buy this product again and I most certainly would purchase from etrailer again. Great company, support and prices!
I just wanted you to know that prior to my installation, this Coachman with a hitch weight of 700+ pounds would push the rear down so much that there was barely daylight between the tire and the wheel well...but look at us now. This '04 Titan with 189,000 miles and original suspension is riding high. Your product helped me get the bed level and has reduced the sway on the trailer so much that it is hardly noticeable. I am very happy with my purchase, your follow-up and the results.
Bought these for my new 2018 Toyota Tundra. On my previous 2010 Tundra, I had installed helper springs and decided to try Timbren's this time around. I bought 1/2" spacers, since I did not want the truck to sag too much. Not sure if you can see in the pictures, but with the 1/2" spacers, the Timbren's come into contact approximately 1/2" to 3/4". They can be a bit rough and bouncy once they come into contact, but no rougher or uncomfortable than with helper springs. Over all I am very happy with how they perform. The installation was very easy. Took me about 1/2 to 3/4 of an hour. All you need is a 24" breaker bar, a ratchet wrench, and a 19mm deep socket. Unloosen the nuts enough to remove the existing bump stop and replace with the Timbren's. That's all it takes!
The Timbren rear suspension bump stops are the best by far. I installed this unit on a 3rd gen Toyota Tacoma which became an essential item for safety towing purposes.
The main reason for purchasing this product was for aided support for towing. This is essential for those who tow boats, tear drop trailers or medium sized campers.
The stock bump stops are relatively small in size which is standard for other vehicle manufacturers however Timbren's bump stop are made with such high quality material and craftsmanship.
This also helps in preventing in stressing the front suspension from becoming raised which can affect your steering when your towing. The Timbren bump stops also helps in preventing your rear suspension from the "sagging effect" which can cause stress to your tires.
I recommend that when you install the bumps stops, check the lugs every quarter or depending on frequent you tow, to include tightening the lugs with a torque wrench to ensure it's torue specification(s).
This product has given me peace of mind when traveling long distances and when camping off the grid. Timbren also has good customer support service however etrailer has paramount customer service as well.
Easy to install. Clearance seems tighterthan what manufacturer states of .5 to 1.5". Haven't towed with them installed yet.
They were quite easy to install. Truck doesn't squat now, while pulling a trailer.
Ordered late on Saturday and received on Monday. Not sure how you did that but awesome delivery time. Took an hour or so to install on my Tacoma, not difficult at all. Installed a heavy cap on the truck so the leaf springs were sagging more than normal. Right now the frame is riding on the helpers so a little rough ride but bought these to be safer towing.
This was a great i intrusive solution for my truck. I can carry my motorcycles on a rack, with no sagging, keeping my trucks handling in tact. Easy installation and maintenance free.
Easy to install using basic hand tools, and stopped the "sag" when I hook up my Casita travel trailer
Mike L.
7/7/2026
Nice setup David, thanks for the photo!
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Ty
5/31/2025
They still work great. No complaints. Holding up just as good as the day I got them.