My air bag was worn out so i decided to replaced it with coil spring. The mechanic adjusted the torsion bars because the rear is obviously high from the front. After they adjusted i measure the height from tire to fender.....left and right front is 7.5 inches rear left is 9.2 inches and rear right is 8.5 (also found out that the left and right rear is not the same ). Wondering what should i do to adjust the rear coil springs at rear end.....thanks in advance..