Timbren Suspension Enhancement System - Rear Axle
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1978 Toyota Pickup
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When you’re hauling a heavy load or towing, rear sag can throw off steering and braking. The Timbren Suspension Enhancement System adds up to 1,800 lbs of load-leveling capacity with hollow rubber springs that sit above the rear axle. As weight increases, the springs get more rigid to keep your vehicle level and stable under load. The result is better control, safer handling, and a level ride when the cargo or trailer gets heavy.
Uneven pavement and rough terrain can quickly wear out stock suspension. The rubber construction of the Timbren springs works like a built-in cushion, taking the brunt of bumps and jolts so your ride feels smoother. By absorbing most of the road shock before it reaches your factory suspension, these springs help extend suspension life and prevent bottoming out on rough roads or steep driveways.
When a curve or crosswind tries to push you around, each Timbren spring reacts on its own to keep your vehicle planted. That independent spring action helps reduce body roll during cornering and stabilizes handling when carrying off-center loads. You’ll feel more in control when changing lanes, taking curves, or towing through gusty stretches of highway.
Adding real load support doesn’t have to be complicated. The Timbren kit includes two Aeon hollow rubber springs, custom-fit brackets, and hardware for a straightforward install that bolts directly onto the frame—no drilling required. Once mounted, the system automatically adjusts as weight changes so there’s nothing to air up, tune, or maintain—just consistent support every time you load up.
Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody. Andy here with etrailer.com. And today, we're gonna take a look at this Timbren rear axle suspension enhancement system. Now, these are custom fit parts that are designed to fit the 2018 and newer Chevrolet Equinox. To confirm that these work for your vehicle, take advantage of our vehicle fit guide here et etrailer.com and input the year, make and model of your vehicle, and our fit guide will let you know if these will work for you or if we have something comparable that will work for you. These hollow rubber springs with an 1,800 pound capacity sit above your rear axle to help stabilize and level your vehicle.
They're going to improve your suspension, your handling, and safety. And these springs also provide additional support as needed so you always have a smooth, comfortable ride, allowing your leaf spring ample movement while cushioning light loads. They're going to ride just as smoothly when you're not hauling a load and they become more rigid as more weight is added for great performance when you're hauling a heavy load, increasing stability and reducing vehicle sag. They work independently adjusting side to side, helping compensate for off-center loads and reducing body roll when swerving and turning corners. Now, these springs also act as shock absorbers, taking the brunt of bumps and rough roads, extending the life of your vehicle's suspension.
So, this kit includes everything that you see here on the table before me. As you can see, I have these springs loosely installed on these brackets. But you are going to get two Aeon hollow rubber springs, and then the vehicle specific brackets, and the hardware for a simple installation. The good news is there is no drilling required. Then you're going to get an instruction sheet here to let you know what you have and step by step instructions to help you along with the installation process.
Now, again, the capacity is 1,800 pounds and it is important to note that these Timbren springs will not increase your vehicle's weight carrying capacity. So, you do not want to exceed your manufacturer's recommended weight limit and these do have a lifetime warranty. Well, that's gonna conclude our look today. I do hope that it was helpful for you. Again, my name is Andy.
Thank you for joining me..
Customer Satisfaction Score:
92% were satisfied with this product
8% of customers were not satisfied
Ratings & Reviews
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!
Lazer S.
7/20/2026
Glad they are working well for you, Kevin! Well, while you are towing, that is. We have heard that these can be pretty rough when unloaded, but work great when you are loaded. A quick release function on these would make taking them off when not towing a lot easier. I may pitch that to Timbren to see if they can work something out. I will tell them to call it something like the Kevin Device if they agree! ^___^ Sounds like quite the trip! What has been your favorite stop so far?
Mike L.
2/26/2026
Thank you Darrell, we're glad to hear your Timbrens are still on the job!
Kate F.
4/23/2026
Thanks for sharing your experience Thomas. It is great to hear the Timbrens made a noticeable difference in ride quality and reduced body roll on your E350 Class C. We also appreciate the heads-up on the install. That kind of real-world feedback about brake line clearance is very helpful for others working on a similar setup. Would be nice if they had a stronger option, if you need the 5K, might need to go to airbags, but who wants to deal with having to air up if you don't need to. Where are you off to on the next adventure?
Mike L.
7/7/2026
Nice setup David, thanks for the photo!
Kate F.
5/6/2026
Glad we had the right suspension upgrade to help with the squat Dennis! How is the ride when you are unloaded?
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.
Heather A.
2/21/2025
Timbrens are the best for sag because they are made of dense rubber. 6500 lbs sounds like one heck of a travel trailer, what is it? Any fun plans this summer?
Jerome
3/2/2026
Awesome product. Would recommend.
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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