cab leveling valve

[Old Driver]

I just replaced mine a few weeks ago. There are bushing that the frame sits on if you lose air. Measure the clearance between the bushing and the frame rail. The height was adjustable on mine by using different holes on the differential. Some of the valves the arms don't separate from the valve and will break the bolt.
I've been told if you change the height too much the drive shafts will shake.