Timbren Rear Suspension Enhancement System
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2018 Subaru Forester
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2018 Subaru Forester
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Hauling a camper, trailer, or bed full of gear can make the rear end sag and the front lift, throwing off steering and braking. This Timbren Rear Suspension Enhancement System adds up to 15,000 lbs of support above the rear axle to keep your ride level and stable. The hollow rubber springs work with your leaf springs to take on the extra weight, reduce squat, and maintain better control while towing or hauling.
Rough pavement or uneven roads can make a loaded truck bounce and jar over every bump. These hollow rubber springs act like shock absorbers, taking the hit before it reaches the frame. The progressive design collapses smoothly at first for light loads and stiffens as weight increases, giving a comfortable ride when empty and solid support when loaded down.
When a passing semi or sharp turn pushes your rig off balance, each spring reacts on its own to keep that side planted. The independent action minimizes body roll and helps control sway so your vehicle stays composed through corners or side gusts. That steadiness also helps keep a trailer in line and reduces turbulence between the tow vehicle and trailer.
There’s no air compressor, no airlines, and no gauges to worry about—just bolt on the custom-fit brackets and hollow springs using the included hardware. The system installs directly onto the frame with no drilling required. Once in place, it automatically engages only when you add weight, so you get reliable load support without any adjustments or maintenance.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello neighbors, Steven here with etrailer.com. Today we're looking at these Timbren Rear Suspension Enhancement System and it's gonna be a custom fit application. So as always, we recommend you go to our homepage etrailer.com, enter your vehicle information at the top center of the page. We're to ask you information like year, make and model, cab size, bed length, anything like that. Make sure you're getting the right parts for your specific vehicle the first time. Now that being said, these guys here are gonna improve your suspension handling and safety, and they're gonna give you a nice comfortable ride.
They're gonna provide the additional support you needed and it's gonna allow your leaf spring ample movement while yet cushioning your light loads. Now this does become more rigid as more weight is applied, and I'll go ahead and throw a graphic up here of that real quick. So when they're unloaded, you can see they're on the left. They're nice and high, relaxed, and then whenever they're loaded, they can squeeze down as much as needed, which will help increase stability and it's gonna provide great performance while you're hauling those heavy loads, it's gonna reduce vehicle sag and they can and do work independently, side to side from one another, and that just helps compensate for those off center loads and things like that. Let's see, they do also reduce body roll when you're swerving and turning corners and they're gonna act like shock absorbers.
They're gonna take the brunt of the bumps and the rough roads and thus extend the life of your vehicle suspension as well. So you're gonna get two of these hollow rubber springs. They do have steel inserts on the bottom, and if you can kind of see or hear inside, they've got washers inside of 'em too. That way whenever you put the bolts through to install them, all the washers are already inside there, but then you get the other parts needed as well. This does install directly onto the frame.
There's no drilling whatsoever required, so that just makes it a much easier install. These are rated at 15,000 pounds. Always, always, always make sure you're not exceeding your vehicle's weight carrying capacity. So keep in mind, this is also designed to work with a suspension system that's already in good working order. Folks, you're gonna have a nice limited lifetime warranty and a satisfaction guarantee with these as well, so you shouldn't have nothing to worry about.
That's gonna wrap it up for our look at these Timbren Rear Suspension Enhancement System. I'm Steve, thanks for watching. Have a great day and stay safe out there.
Ratings & Reviews
Added these to my F250 Super Duty. I carry a golf cart on a Diamond back bed cover. Can be a little top heavy. Perfect addition to my suspension- greatly reduced the sway.
1.5" gap... it came with 1 spacer for each side. if i buy the spacer kit, what size are they ? i have a 2026 f350.
Helps prevent about 1/2" of sag with my 175lb-tongue weight trailer and easy to install.
Easy to install using basic hand tools, and stopped the "sag" when I hook up my Casita travel trailer
Easy install took about 20 minutes on my 2017 Ram 3500 SRW. Had about 1/2 inch clearance as recommended. Loaded up my 5th wheel (2350 hitch weight) and about 200 lbs of gear in the bed. Just got back from a 800 mile camping trip through mountains of TN. You can really feel the difference around those sharp corners and uneven surfaces. The truck felt firm and controlled not hard and jarring as some have mentioned. Going over those overpasses with the wonderfully smooth (Not) joists was greatly improved. The truck would squat and rebound again, with a firm controlled response. Driving without a load felt the same as before without them. I would highly recommend these! Ordering from etrailer continues to be my go to option!
Great product. The ride and body roll at the rear axle are notceably improved (1989 Ford E350 Class C RV , 27 ft). I give it 4 stars because the installation was slightly complicated due to the rear brake lines needing to be slightly bent to provide clearance for the U bolts supplied in the kit. Great product and wish it came in a 5000 lb version.
2,000 miles in on a trip from the east coast to the Canadian Rockies these work great while loaded and towing. Close to zero bounce while towing, I love them. Unloaded, however, the ride in my 2026 Tundra has gone south. There is a noticeable, abrupt stop of the units hitting the axle when going over any kind of bump. When I get home and back to regular driving, I may just take them off, its that bad.
I've had these on our tow rig for a year now and I added buy them again today if I needed them.these have worked much better than airbags for our coil spring rear suspension to handle the tongue weight of our trailer. The SUV sits level when the trailer is on and it handles bumps and sway better than the airbags did providing much more comfort to us in the vehicle. Unloaded, we don't really notice they are there, unless, we have all the kids and some friends loaded up and you will fell them work when going over bumps.i do all my maintenance on the vehicle's and inspect these regularly and I cant see any wear so far even though we've gone on 6 trips with our trailer with about 5000 miles doing so.
I cant say these are the best for every truck or SUV, but for ours it is the best and I definitely would recommend to others.
Well they are exactly what I thought it would be. Hard for me to say it's what I needed yet.
I installed them on a homemade trailer from a salvaged 2001 base model tacoma. Once I get finished building it out and have some weight in it I'll have a better idea. But from what I've seen so far on a couple test drives they should come into effect when needed.
For reference I building an Tacoma based trailer with an ARE Contractor topper with a Naturnest roof top tent on the very top. So to counter and sway these should be very helpful. At least I hope so. I'm not an engineer but I did stay at an Holliday Inn once.
The Timbren SES is a simple solution for rear squat when towing. When hitched to my 30' Airstream Globetrotter (8800 GVWR) with a tongue weight around 1200 lbs, my Silverado 2500HD had a bit more squat than is ideal. I shopped airbags but didn't want to spend ~$2K for the set up and didn't want the hassle of installation and forever chasing air leaks. The Timbren SES literally installs on the Silverado in about 15 minutes. So simple. No bags, no compressor, no wiring, no air lines, no leaks. And WAY less expensive to boot. Just returned form a 600+ mile trip and it towed flawlessly.
A very simple and straightforward installation once you get the oem bumper stops off (had a shop do that)
Timbren worked with me as I had a non OEM frame height (vehicle was lower than stock) to recommend the proper kit. Highly recommend contacting timbren if you are unsure of the proper kit to use. Ride is more stable. It does feel stiffer and less bouncy but am looking forward to seeing how it performs with my truck camper. Truck is a 1998 dodge ram 2500. Brake line over left side of axle needed to be secured to prevent damage.
The Timbren overload spring/bumper was east to install and did what it was supposed to do when I hitched up a camp trailer. These did not negatively affect the ride by any means and I don't have to worry about the troubles with air bags.
Stiffens and corrects kneel in rear end of 2023 Chevy Silverado 1500. You will notice a stiffening of the rear end suspension while unloaded, but it’s a fair trade off to prevent sagging and porpoising while towing. I found it easier to pull the rear wheels and work from the side than underneath the vehicle while installing.
The timbres bump stop is exactly the right height to meet the axel when the trailer is connected with all its weight onto the hitch. I have an Andersen weight distribution hitch and it levels out perfectly. The day picture is with the coach (Winn 2100bh) with factory equipment. The night picture is after the timbres are in place. Looks good.
It has been almost a year since I installed Timbren Suspension Enhancement Systems (DVF350 and DVR350R) on the front and rear of my 2003 Dodge RAM Van 3500. These bumpers replaced the OEM bump stops that were on my van. I like the Timbren bumpers much better than the OEM bump stops because they provide a progressively cushioned response for suspension compression when traveling over significant humps like speed bumps in a parking lot, or curb ramps into driveways. I did not like the abrupt stop the OEM bump stops provided when traveling over the same objects. I installed the Timbren rear bumpers first, and after a few months of use, I decided to add them to the front. In both cases, the front and rear Timbren bumpers were easy to install once the OEM bump stops were removed. Installation required reuse of the factory hardware. On my van, the Timbren bumpers are not always engaged. Under normal load and travel conditions the bumpers are relaxed and about 1/2” away from the suspension landing points. However, their presence is much appreciated and very noticeable when the van is carrying heavy loads or handling significant humps.
Absolutely Pleased with the TIMBRENS. They were easy to install, and took less than an hour to install both. I noticed a slight stiffness in the ride as the rear bounced over a bad roadway. Towing is great, with a nice level and smooth ride. I am glad that I did not order the heavier duty Timbrens, than what was recomended for my truck. I believe the ride would have been too stiff. If you look at the photos showing the timbrens, the truck is still lifted in the rear, so what you see is a big gap between the rubber, and the steal plate. When the truck is lowered, there's 1" of space as it should be. BTW, I have been purchasing from etrailer for years now, and I have to say that I have never had any issues with any orders. They are my go to folks for all of my vehicle suppension stuff and trailer stuff. You can't go wrong with buying from them.
My F53 was like driving a waterbed down the road. With the Timbrens, it’s a different vehicle. Should have installed them years ago. Etrailer is my go to for anything trailer. FAST shipping and prompt responses to questions or concerns.
2022 F250 Super Duty. Super easy to install. I have about 3/4" gap between the spring and the plate. Time will tell how they impact the ride quality and how much sag they mitigate with my 5th wheel hooked up.
Timbren Spring Helpers were exactly what I needed on my Tundra plus a spacer kit since I have a 3” TRD lift. They were packaged neatly, with proper hardware, and excellent instructions! They absolutely do exactly what they are supposed to do! Truck rides much better and helps level out the load!
Great upgrade when pulling our 6500lb travel trailer. Helps with sag and control on the road on our Ram 1500. Change the stock shocks and if you choose, upgrade your stock springs, and you'll get the most out of your half ton.
I'm suitably impressed with the difference i feel.
I have about 250 lbs. of static load with my topper and Decked cargo system. This put my install gap with no spacers just under the reccomended 1 inch minimum.Then add a couple hundred more pounds hauling music gear 100 shows a year, and the stop is resting on the axle.
I feel the absorption of the Timbren material is better than the flimsy stock bump stops. More cushion.
Where i really feel the difference is in the stabilty of excessive side sway when turning while loaded.
I have a gig coming up that will involve some unpaved mountain roads to get there so I think i will have a real goid idea of how these Timbren's will perform.
Instalation took me about an hour at 11 p.m.
The product it of the highest quality in design and build.
And Etrailer is a company that I would not hesitate to buy from in the future.
Thanks Dee Dee.
You rawk!!
Brings a tremendous amount of capacity for load on the vehicle, but made the ride terrible. The truck was so stiff it was like riding on axles . Recently took both front and rear timbren kits off due to ride . I'm currently looking for an alternative
Great system works great and way better stability
I used this on my Isuzu tow truck. The blocks in and of themselves are fine, they support the weight. Here's the problem: They are pre-loaded, meaning that they always touch between the frame and the rear axle. As you load the vehicle this puts more pressure on the frame in this 5" area where the blocks are. The springs have not yet taken as much weight as they normally would. Now, all this upward pinpoint pressure bends the frame. This is what happened to me on my rollback tow truck. After many hours and now double plating the frame all is well again, but a tremendous amount of work. Yes, the blocks are fine, but the result of installing this product resulted in a bent frame. The vehicle was not overloaded and was within the GVWR.
Jenny N.
1/20/2022
I have reached out to the manufacturer who will be reaching out to you.
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Gwendolyn Y.
3/26/2026
Always a plus in my book!