See Figures 1, 2, 3 and 4
The full size Cadillac models use a four-link rear suspension system. The axle housing is connected to the frame by two upper and lower control arms with rubber bushings at each end of the arm. Two coil springs support the weight of the car in the rear. They are retained between seats in the frame and brackets axle housing and the frame. A rubber insulator is used on the upper side. Shock absorbers are mounted between the axle housing and the frame.
The Commercial Chassis and 1976-79 Seville models are semi-elliptical leaf springs to support the rear axle. Shock absorbers are mounted between the axle housing and the frame.
The rear suspension on the 1967-70 Eldorado models consists of two single leaf, semi-elliptical springs, two vertical and two horizontal shock absorbers.
The 1971-78 models use a four-link, coil spring suspension. The rear axle is a straight, hollow tube design. The spindles are pressed and bolted to the axle flanges and taper roller bearings are used.
The 1979-85 Eldorado and the 1980-85 Seville utilize an independent rear suspension system, incorporating a relatively long control arm for a minimum camber change. The hub and wheel bearing is one unit which requires no periodic maintenance or adjustment.
The 1986-89 Eldorado and Seville utilize an independent, transverse mounted leaf spring rear suspension system. All components are attached to a center crossmember assembly which is attached to the vehicle's body at four points. Each rear wheel is connected to the crossmember assembly through the suspension knuckle using an air-adjustable strut and lower control arm configuration. The transverse mounted spring is a single leaf design constructed of a lightweight composite material. The hub and bearing is a single, non-serviceable unit which requires no periodic maintenance.