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Heavy gear or a loaded trailer can make the rear end sag and throw off your balance. The SuperSprings Suspension Stabilizer and Sway Control Kit adds up to 800 lbs of support to your factory leaf springs. Mounted above the OEM springs, these helper springs automatically engage when your suspension flexes under weight, lifting the rear and keeping it level without bottoming out. That means steadier handling, proper headlight aim, and a more confident ride when towing or hauling.
When wind blasts or curves throw your truck around, these helper springs act like built-in sway bars. The roller-and-shackle setup helps keep the OEM springs from twisting, cutting sway by up to 30 percent. The result is a more planted feel on highways or mountain roads, especially when passing big rigs or cornering under load.
There’s nothing to air up, watch for leaks, or adjust between trips. These springs work automatically—load them up and they react on their own. No tubing, no gauges, no crawling under the truck to tweak air pressure. Once bolted on above your existing springs, they keep doing their job trip after trip without extra maintenance.
The shackles that attach these helper springs let you choose your setup. Use the upper bolt holes for constant heavy loads or older suspension that’s lost some height, the lower holes to maintain factory ride conditions, or a mix of both for balanced comfort and support. This flexibility lets you dial in how much lift and stiffness you want based on how you use your truck.
You can mount this kit with basic tools right in your driveway. The system bolts directly above your factory leaf springs—no drilling required—and includes an additional mounting kit for setups where the OEM leafs sit above the axle. The brackets act as fulcrum points for quiet operation when unloaded, giving you a clean install and a smooth ride whether empty or loaded down.
Ratings & Reviews
Mike L.
2/8/2019
If you look at page 4 of the instructions which Ive linked for you, you can see photos showing a single leaf spring set up just like whats shown in the photos you provided thanks for the photos!. Im guessing that page was not included in your instructions for some reason.
Helpful Links
Timothy
2/9/2020
Springs are working wonderful after I figured out the install,. The initial problem was all my fault for being a man and not really reading the instructions haha. All is well
Brooke M.
6/11/2025
That's awesome, Douglas! Great to know these have been the solution you were looking for. The Timbrens are known to be pretty stout for sure. I can totally see how these would have the right amount of give needed to support the camper and have a smooth ride :) Have you taken out the truck and camper recently?
Conrad
8/19/2021
After about one year, these are still working great. I typically use my truck for pulling my 5th wheel. But - even when empty, you dont really feel anything different. When the camper is on, it sure levels the truck and camper out perfectly, giving you a great ride.
Victoria H.
11/11/2024
Hi Chris, there should've been a hardware kit for suspensions with leaf springs that sit above the axle. Please let me know if this is the hardware kit that was missing, and I can help you get this resolved.
Larry P.
10/3/2022
They work great, they improved the rear suspension so there is no more bottoming out when I pull the 5 wheel Rv .
Mike L.
10/1/2026
UPS is currently doing an investigation, once they figure out what's going on we'll get you an update. I'm very sorry for the delay.
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Howard
11/9/2020
One Year later still no sag.