SumoSprings Custom Helper Springs - Rear Axle
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2018 Ford Transit T350
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2018 Ford Transit T350
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Heavy trailers and bed loads can make the rear sag and throw off steering feel. These SumoSprings helper springs add up to 1,400 lbs of support at 50-percent compression to help keep your ride level and predictable. They back up your factory suspension so you can tow or haul without the rear dropping low or the front lifting high.
Uneven pavement and bumpy backroads can make a loaded truck bounce around. The progressive design of these springs means they compress gently with lighter loads for a soft ride and firm up automatically as weight increases. That extra resistance keeps your suspension balanced and your drive comfortable whether you’re carrying gear for the weekend or hooking up a small trailer.
Every pothole or expansion joint sends a jolt through the frame if the suspension bottoms out. The microcellular urethane in these springs acts like a cushion between the axle and frame, soaking up shocks before you feel them in the cab. The closed-cell material resists road salt, oil, and UV damage so it stays reliable year-round without air lines or fittings to maintain.
When cargo sits off to one side or crosswinds hit on the highway, body roll can make driving uneasy. Each spring works on its own to balance uneven loads and limit side-to-side sway. You’ll notice steadier cornering, better control, and less rocking when pulling into driveways or turning with weight in the back.
These helper springs mount to existing attachment points with no drilling required, so getting them on is straightforward. Once installed, there’s no need to monitor air pressure or adjust settings—just dependable support that’s always ready for towing or hauling duty. Backed by a limited lifetime warranty and a 30-day satisfaction guarantee.
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 real quick look at the Sumo Springs Rear Axle Custom Helper Springs. Now this kit has been designed to fit your 2024 and newer Toyota Land Cruiser and Tacomas, and your 2022 and newer Lexus LX600, and your 2023 and newer Toyota Sequoia. On custom fit parts such as this kit, 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 these will work for you or if we have something comparable that will work for you. So whether you're hauling weekend gear or towing a small trailer, these springs adapt to that load.
Light cargo is going to compress them slightly for a soft ride, while heavier loads are gonna activate more resistance, keeping your vehicle level and your drive predictable. Now these have a weight capacity of 50% compression of 1400 pounds. But do be aware of the fact that Sumo Springs do not actually increase your vehicle's weight carrying capacity. But these are designed to handle harsh environments. The closed cell urethane is going to do a great job of resisting salt, oil, and UV damage.
And what's nice about this kit is you don't have to worry about any air lines or fittings. This is basically going to be a set it and forget it solution built for year round reliability. If you hit a pothole or a rough stretch of road, these springs are gonna act like a cushion between your frame and axle, soaking up the impact to reduce jarring and minimizing bounce. So it's gonna be a relatively small upgrade that's gonna make a big difference in comfort. So if you're carrying like a tool chest or cargo that sits off to one side, each spring's gonna work on its own to manage side-to-side movement.
That's gonna help reduce body roll during turns, giving you more control on the road. So this includes everything that you see here. You're gonna get the springs, custom fit brackets, hardware, some lock tie here, and then instructions to guide you through the pretty simple, in my opinion, installation process. If you do pick these up, we would love to hear back from you regarding your experience with getting these installed and using them, so you can share your experience with us by dropping a comment or leaving a review on this product page. And if you happen to have any other additional questions, don't hesitate to reach back out to us.
We wanna make sure that you're getting exactly what you want and need. Well, that's gonna wrap up our quick look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
Brooke M.
6/18/2025
Definitely less moving parts to worry about than airbags :) The install looks great! Are you hitched up in the photo to test out the springs or were you actually on your way to the water?
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Donald
10/8/2026
Cant believe its been a year since I installed the SumoSprings. Every time I go around a corner I so appreciate the excellent handling I now have. The Sumos have earned their 5th STAR!