Abstract: An adjustable leveling suspension unit for vehicle shock absorbers having an external coil compression spring in cooperation therewith in the general manner of the MacPherson type strut assembly. The adjustable leveling unit includes a seat for the coil spring which is slidable on the shock cylinder, a collar and sleeve combination on the shock cylinder in position to support the seat and to slide the seat to different positions on the shock cylinder when necessary to correct for spring sag and restore the shock absorber to its desired position, and a guide or key to hold the spring seat against rotation while being moved on the shock cylinder.