SumoSprings Helper Springs For a 2017 Ford Expedition

Updated 02/17/2026 | Published 06/13/2024

Question:

My wife has a 2017 Ford expedition limited 4x4. Was researching ways to stiffen the rear end for better control and less rear movement. We live in a very mountainous area and the rear end is rather bouncy. We seldom tow anything with this vehicle as we also have an f250. But with 5 kids and/or a large grocery hall, we tend to have a few hundred pounds spread throughout the rear. But the bounce has been making the kids and us as adults a bit car sick. Do you think this product would help? Should we also look into away bar and or better shocks?

asked by: Josh

Expert Reply:

The Coil SumoSprings Custom Helper Springs # CSS-1168 are only confirmed to fit the front springs on your 2017 Ford Expedition. If you can provide me with the diameter of you rear springs along with the height between the coils when there is no weight on the rear suspension I can check with SumoSprings and see if they have a rear option for your SUV.

expert reply by: Bud M

Robin H.

2/17/2026

Hey, were you able to get the rear spring diameter and coil spacing measurements for your Expedition? Once you have those details, I can check if SumoSprings offers a rear option that fits. Let me know what you find so we can narrow it down.