SumoSprings Solo Custom Helper Springs - Rear Axle
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2018 Chrysler Pacifica
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2018 Chrysler Pacifica
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When your truck squats from heavy towing or a loaded bed, steering and braking can feel off. These SumoSprings Solo helper springs add up to 1,000 lbs of rear support at 50-percent compression to keep your ride level and controlled. The microcellular urethane springs take on the extra weight so your factory suspension can maintain balance, traction, and proper headlight aim when you're hauling big loads or pulling a trailer.
Not every haul weighs the same, and that’s where the progressive load control comes in. The springs compress easily for lighter loads to give you a soft, smooth ride. As the weight increases, they firm up to handle heavier cargo—compressing by as much as 80 percent for extra support. This means less bounce and bottoming out on rough roads and a comfortable ride when unloaded.
When uneven loads or tight turns try to throw you around, these helper springs work independently to keep each side stable. That independent action helps reduce body roll in corners and compensates for off-center loads, so your vehicle stays planted and predictable whether you’re tackling mountain roads or crossing uneven driveways.
Forget about air lines, compressors, or pressure adjustments. The closed-cell urethane construction is completely maintenance-free and resists oil, salt, and UV damage while performing in temperatures from -25°F to 200°F. The springs compress vertically with minimal side movement so they fit in tight spaces without rubbing nearby parts. A simple no-drill installation gets you back on the road faster without extra components to maintain.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Kate F.
7/21/2026
One of my favorite things to recommend Kevin, the feedback is always so great on what a difference they make! What are you mainly towing that needed the extra support?
Gwendolyn Y.
5/16/2025
I'm glad that the Sumos helped with the handling, David! And I think your pretty handy if you can get these installed :)
Richard
10/5/2026
It works great with the trailer hooked up. with the pickup truck empty and no trailer, when you hit small bumps or dips, you hear and feel the spring as it hits the axle.
Joshua
12/3/2025
Not worth it. If you’re going to make this change get the air bags.
Victoria H.
3/6/2025
Hi Luis, I'm happy to hear install was easy and you feel confident these will improve your ride quality. Feel free to update us once you get the chance to test them out.
Lee D.
10/27/2025
The Sumo springs are still doing their job and I am happy with the performance when towing.
Brooke M.
12/3/2024
Let us know what you think once you get them installed! I think you will love them because they do their job very well. Looking forward to hearing from you again!
Glen
12/3/2025
After a year these Sumosprings are performing as anticipated. Slightly stiffer ride empty, but a welcome addition when hauling trailers with substantial tounge weight. They minimize sag and really help with sway.
Sierra K.
6/24/2022
I contacted the manufacturer and showed them your photos. It is very rare, but your truck is taller than most. They will send you a taller spacer.
Robert
11/20/2022
After using the SumoSprings for a year now, I found them to very helpful when towing either my travel trailer or boat. Rear sag on the truck is reduced about an inch and towing is much more stable with reduced bounce. Excellent product.
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Richard
2/12/2026
No issues. Towed a 27 Airstream around 4k miles & its all good.