Timbren Rear Suspension Enhancement System
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1989 Ford Bronco
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1989 Ford Bronco
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When the rear sags from a heavy trailer or bed load, steering and braking can feel uneasy. The Timbren Rear Suspension Enhancement System adds up to 5,600 lbs of extra rear support to keep the vehicle level and stable. The hollow rubber springs mount above the axle and stiffen progressively as weight increases, working with your factory suspension to eliminate squat and restore confident control when towing or hauling.
Bumpy roads and uneven pavement can beat up your suspension over time. These Aeon hollow rubber springs act as built-in shock absorbers, cushioning bumps and rough terrain while reducing wear on your factory components. They take the brunt of road shock so you get a smoother, more stable ride even with gear or cargo in back.
When crosswinds push or a curve leans you over, each spring reacts only when it’s needed. The independent driver- and passenger-side support helps reduce body roll and keeps handling predictable during swerves or uneven loads. This means better control on winding roads and less side-to-side rock when a gust hits or a trailer moves behind you.
Getting reliable load support shouldn’t require a shop visit. The Timbren system bolts directly to vehicle-specific brackets above the rear axle with no drilling required. Once installed, there are no airlines, compressors, or adjustments to manage—just consistent support that automatically engages when weight is added and backs off when unloaded for normal ride comfort.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
James D.
7/24/2026
We're glad to hear the Timbren suspension system is already making a difference. We'd love to hear how it performs over time. What are you using your vehicle for most often; towing, hauling, or everyday driving? Thanks for your review and we appreciate you choosing etrailer!
Vernon
7/27/2024
Just like expected. Great
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
Kate F.
5/6/2026
Glad to hear the Timbren systems worked out so well for your RAM Van Mitchell! It’s great that you noticed the smoother, more progressive response compared to the factory bump stops, especially under load. Thanks for sharing your experience with both the front and rear installs, that’s really helpful for others considering the upgrade. What kind of loads are you usually hauling with your van?
Brooke M.
5/7/2025
Wow, thank you for sticking with us, Don! That is awesome. I think you made an excellent choice here. Timbrens are tough and the heavy duty are SUPER tough. Glad to hear these were a good fit. Love the photos! Is that your own property?
Don
5/21/2026
The TIMBRENs work as stated during when I am pulling anything heavy. However, when the truck is not pulling anything, anyone riding in the rear seat gets a very hard jarring jolt when driving over any roadway repairs, bumps, expansion joints on bridges. I wished that I would have went with the Super Springs, or the Road Active Suspension. I may replace the TIMBRENS later.
Gwendolyn Y.
5/21/2026
Lazer S.
6/16/2026
They definitely look like they are helping, Orlando! How are they when you aren't towing? We hear a lot of people say they can be pretty harsh when unloaded.
Kate F.
7/13/2026
Bud, thank you so much for taking the time to leave a review! I'm glad to hear the suspension upgrade helped reduce the sagging and porpoising while towing. I also really appreciate you including the installation pictures and sharing your tip about removing the rear wheels. I'm sure that will help the next person tackling the install. Thanks again for choosing etrailer!
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!
Heather A.
4/24/2026
Hi there, thanks for reaching out, that’s actually a common issue with this type of trim. The one you tried is a standard flat insert, but some RVs (like your NOBO) use a slightly domed trim to help it sit over the screw heads in the track. If the screws stick up even a little, a flat trim won’t fully snap in place, which sounds like what you’re running into. The best way to find the right replacement is to remove a small piece of your original trim, lay it flat, and measure the full width from edge to edge. Most are either 3/4" or 1", but the shape matters too, not just the width. If yours has that domed profile, you’ll want something similar or a softer vinyl that can flex over the screws. If you’re able to send a quick photo of your track or old trim, I’d be happy to help you find a better match.
Mike L.
4/23/2026
Niiiice, I see what you did there!! That looks like a sweet setup!
Mike L.
4/23/2026
Mike L.
4/2/2026
Glad to hear they worked well for you Jerrod. Hope you had a good trip!
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Mike L.
4/2/2026
Thanks for the photo, Sid. Quite a bit of difference there!!