if the car is not preloaded heavy on the driver,which would cause this condition. i would measure the distance from the floor to the bottom of the front frame horn,s, to make sure they were same height. do this on as flat a surface as possible, if the pass side frame horn is lower for any reason, weak spring, bad shock, diff roll out on tires, ect, this would cause the driver side rear to be too high, rather than pass side too low, hope this helps.