S.Kovak

For vibration what you really want to set is the pinion angle. Ride height is a function of pinion angle and usually if you set the ride height correctly the pinion angle is also correct. The pinion angle on a 4x2 is 3.5 degrees, FYI on a 6x4 it is 2.5 Degrees on the first axle. these measurements are relative to the frame. How to properly set. This must be done on a reasonably level surface. Release the parking brakes and take the vehicle out of gear. You do not want the vehicle to bind up during setting and obviously you can't set it on a hill. Set the rod so that the frame is approximately level. Dump some air out of the system and then let the vehicle return to ride height. Set the inclinometer on the frame rail. These are just fancy levels and can be purchased for not a lot. Zero it on the frame. Set the inclinometer on the axle right by the suspension clip group. Axles are not perfect so you may want to take a couple of readings. Your target is 3.5 degrees. Adjust as needed. Each time you adjust you have to dump some air out and let it refill. This is due to the dead zone of the leveling valve and you always want it at the bottom. Hope this helps