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Heavy trailers and bed loads can make the rear end sag, throwing off steering, traction, and braking. The Timbren Suspension Enhancement System adds up to 5,600 lbs of load-leveling capacity to help stabilize and level your ride. The hollow rubber springs sit above the axle and work with your factory suspension to keep your vehicle level when towing or hauling gear, so handling stays predictable and the ride feels balanced.


Bumpy roads and uneven pavement can beat up your suspension and your back. These Aeon hollow rubber springs act as shock absorbers, taking the brunt of bumps and rough surfaces to deliver a smoother, more comfortable ride. The rubber construction cushions light loads while allowing normal suspension movement, reducing wear on your factory parts and keeping the ride quiet and composed even on rough terrain.

When corners or crosswinds push you around, each Timbren spring reacts independently to support that side of the vehicle. This helps reduce body roll when swerving or turning and keeps you steady through curves or when loads are off-center. The improved roll stability also helps keep a trailer tracking straight behind you, cutting down on sway from wind gusts or passing semis.


Adding serious support doesn’t have to be complicated. The system includes two hollow rubber springs, custom-fit brackets, and all necessary hardware for an easy bolt-on installation—no drilling required. With no air hoses, compressors, or gauges to deal with, these zero-maintenance helper springs deliver lasting performance that keeps your suspension working better for years.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody, Andy here with etrailer.com. Let's take a look at this Timbren Rear Axle Suspension Enhancement System. Now, this system has been specifically designed to fit your 2022 and newer Ford E-Transit Van Cutaway or Chassis Cab. On custom fit parts such as these springs, I do recommend taking advantage of our vehicle fit guide here at etrailer.com. Simply input the year, make, and model of your vehicle and our fit guide will confirm if this system will work for you or if we have something comparable that will work for you. Now, these hollow rubber springs have a 5,600 pound capacity, and these are gonna sit above your rear axle to help stabilize and level your vehicle.
These springs are gonna provide additional support as needed, so you always have a smooth, comfortable ride, allowing your leaf springs ample movement while cushioning light loads. Now these are going to ride just as smoothly when you're not hauling a load. They actually become more rigid as more weight is added for great performance when you're hauling a heavy load, increasing stability, and reducing vehicle sag. Now these are going to work independently, adjusting side to side, helping to compensate for off-center loads and reducing body roll when swerving and turning corners. These springs also act as shock absorbers, taking the brunt of bumps and rough roads, thereby extending the life of your vehicle suspension.
So this kit includes everything that you see here on my table before me. You're gonna get the two Aeon hollow rubber springs and the hardware that will work with your E-Transit. And the capacity, again, is 5,600 pounds. But it is important to note that these timber Timbren springs do not increase your vehicle's weight carrying capacity. So just be aware of that.
You wanna make sure that you're not exceeding your manufacturer's recommended weight limit. Instructions are included to guide you through the installation process. And these do have a lifetime warranty from Timbren. Well, that's gonna wrap up our look today. I do hope that it was helpful for you.
Again, my name is Andy. Thank you for joining me.
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.


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.
4/2/2026
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.

Lazer S.
8/19/2026
Glad to hear they are working well for you, Ryan! Now that they are on, where you headed?

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!

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!

Claire H.
7/14/2026
Wow! That is quite a difference between your factory bump stop and the Timbrens! Definitely let us know how they perform for you!

Mike L.
4/2/2026
Thanks for the photo, Sid. Quite a bit of difference there!!

Mike L.
4/29/2026
Thanks for the excellent photos, Steven!

Nick S.
12/15/2025
I am glad to hear they helped with both the sway as well as the rear sag with the camper! Not adjustable like airbags but they do the trick. What kind of camper do you have?
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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