Determining The Correct Spacers For Firestone Ride-Rite Springs On A 2018 Ford F-250 With 4" Lift

Question:

I have a 2018 F250 FX4 4wd with 5th wheel prep package. I have a BDS 4inch lift kit installed. The taller rear blocks in the kit have raised the jounce bumper tongue 2inch higher than stock leaving a bigger gap than stock between the axle and the jounce bumper stop. I see the kit has a support bracket that attaches to the outer part of the lower bracket and is supposed to rest on top of the axle. If I put in a bigger spacer than what is provided affect the support bracket that touches the axle?

asked by: Michael S

Expert Reply:

Adding in lift spacers is totally normal when a vehicle has a suspension lift so you'll just need to determine which spacer is going to be the best to fill in the gap left by the lift. A 4" lift doesn't always mean that you'll have a 4" gap so you'll need to first install the upper and lower brackets and then measure the distance between them. You can then look at the chart (pictured below) and pick the correct spacer kit for the gap.

1-1/4" # F2536
2" # F2366
3" # F2367
4" # F2370

These spacers will sit between the air spring and the lower bracket when you install them.