Timbren Rear Suspension Enhancement System
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1989 Ford Mustang
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1989 Ford Mustang
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Heavy trailers or bed loads can make the back of your vehicle sag and throw off your steering and braking. The Timbren Rear Suspension Enhancement System adds up to 3,000 lbs of load support using hollow rubber springs that sit above the rear axle. They stiffen progressively as more weight is added, keeping the ride level and your handling steady when hauling or towing. With the rear end supported, you maintain traction, control, and proper headlight aim even when the load gets heavy.
Bumps, dips, and rough terrain can make an unloaded ride uncomfortable. Timbren’s hollow rubber springs act as shock absorbers, soaking up road shock to give you a smoother, more controlled experience. The progressive design cushions light loads while allowing the factory suspension to operate normally under everyday conditions. You keep a comfortable ride around town but gain serious damping when it counts.
When corners get tight or loads shift to one side, each Timbren spring works independently to stabilize your vehicle. This helps control body roll during sharp turns or swerving maneuvers and keeps you level when carrying uneven loads. You stay steadier through curves and crosswinds, with less rocking and sway from trailers or heavy cargo.
Timbren’s system bolts directly onto existing frame points using custom-fit brackets—no drilling required. There are no air hoses, compressors, or gauges to set up or maintain. Once installed, it automatically engages under load and stays out of the way when not needed. It’s a straightforward setup that delivers reliable suspension support every time you hitch up or haul something heavy.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
John P.
5/3/2023
GREAT I CAN LOAD UP TO 500 EXTRA POUNDS IN REAR OF 2019 FLEX THANKS TO THESE TIMBREN SUSPENSION COMPONENTS
Katrina D.
8/20/2024
Yeah, Timbrens are built for constant use. Like, landscaping work vehicles, tow vehicles, towing trailers daily, truck campers, etc. If they are not in consistent use, then they will make your drive very stiff. If you are only needing to prevent sagging every so often and not daily, then air bags are a much better choice.
Jeffery
8/22/2022
Working great, it’s a nice and tough product
Steve
9/8/2023
Fantastic
Mike L.
11/1/2023
Robin H.
9/22/2026
Thanks for taking the time to share such a detailed review and all of the pictures! The unloaded ride is a concern we hear fairly often with SES upgrades, so your experience with the 1" gap and rough-road testing will be really helpful to others considering these for their F-250. We appreciate the kind words about Naomi and our team as well. Looking forward to your update once you get some miles on them with the Rockwood!
Christopher H.
8/14/2026
Love hearing this! Really appreciate the detailed feedback and photos. That extra stability when you're loaded up can make a huge difference. And installing them at 11 at night—that's commitment. Hope they treat you just as well on those mountain roads. Safe travels and we'll definitely make sure Dee Dee gets the shoutout.
Lazer S.
8/19/2026
Glad to hear they are working well for you, Ryan! Now that they are on, where you headed?
Jay S.
8/14/2026
Now that its been a year Im very impressed with them. Theres no ride detriment without the 5th wheel attached and they do a great job of mitigating squat
Christopher H.
9/3/2026
Happy to hear the Timbrens are making that big of a difference Tony. Thanks for including the photo and we appreciate the kind words! Have you taken any longer trips with the Timbrens installed?
Jesse M.
9/10/2026
Awesome! Glad to hear the Timbrens made such a big difference in the ride quality. Thanks for sharing! Happy travels!
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Nick S.
11/10/2025
That is great to hear! I am glad you noticed that difference right away. What do you do for your business?