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When heavy gear or a trailer pushes your rear suspension down, these hollow rubber springs step in to carry the load. With an 8,600-lb capacity, the Timbren Rear Suspension Enhancement System adds solid support above the axle to keep your ride level and steady. The more weight you add, the more the springs stiffen, reducing sag and keeping steering and braking consistent when you’re hauling or towing.


Loaded or unloaded, you’ll feel how these rubber springs take the edge off bumps and potholes. Acting as shock absorbers, they cushion the ride by soaking up road shock that would otherwise rattle through the frame. That smoother ride translates to less stress on your suspension and fewer bottom-outs on rough terrain or broken pavement.

Each spring works on its own, so when one side of your truck leans or hits a bump, the other side stays steady. That independent action cuts down body roll in turns and keeps sway in check when a trailer starts pushing or a crosswind hits. The result is a more planted feel and faster recovery when things get unsettled on the highway.


There’s no compressor, no air lines, and no adjustments to fuss with. The kit includes vehicle-specific brackets and hardware that bolt directly in place of the factory bump stops—no drilling required. Once installed, the rubber springs automatically engage as needed and work quietly in the background every time you load up or tow.

Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews

Nick
3/30/2021
Great! Happy with my purchase.

Mark
2/9/2025
Removed the extra pucks and retained the rubber springs. Much better ride while not towing heavy loads.


Vito J.
5/22/2021
excellent. extremely happy with my decision to purchase!!

Glen S.
4/5/2018
Great stopped the sagging suspension and swaying

Dwayne M.
8/17/2017
Great no problem
Do you have a question about this Vehicle Suspension?
Condition: Installed
Notes: There are install marks from a previous test fit. Also, only includes one of the lock washers.
Info for this part was:
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Brooke M.
5/13/2025
That's awesome, Brandon! Thanks for the sweet photo too -- what was 1200 miles away?