How much slip travel should a CJ5 driveshaft (propeller shaft?) have front and rear? I just took my M38A1 off about a 4" lift and returned it to stock height. I don't know if the previous owner had put extra long drive shafts on it for the lift. They both appear to have about 1.25" of travel available before they bottom out. This is when the vehicle is sitting on the ground. When it sits on the ground the axles are about 5" below the bump stops. Any thoughts are appreciated.