Chevrolet Full-size Cars 1968-1978 Repair Guide

General Information

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Fig. Fig. 1 View of the rear coil spring suspension-except 1968-76 station wagons



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Fig. Fig. 2 Rear leaf spring suspension on the 1968-76 station wagon

The rear axle assembly is attached to the frame through a link-type suspension system. Two rubber bushed lower control arms mounted between the axle assembly and the frame maintain fore and aft relationship of the axle assembly to the chassis. Two rubber bushed upper control arms, angularly mounted with respect to the centerline of the vehicle, control driving and braking torque and sideways movement of the axle assembly. The rigid axle holds the rear wheels in proper alignment.

The upper control arms are shorter than the lower arms, causing the differential housing to rock or tilt forward on compression. This rocking or tilting lowers the rear propeller shaft to make possible the use of a lower tunnel in the rear floor pan area.

The rear upper control arms control drive forces, side sway and pinion nose angle. Pinion angle adjustment can greatly affect vehicle smoothness and must be maintained as specified.

The rear chassis springs are located between brackets on the axle tube and spring seats in the frame. The springs are held in the seat pilots by the weight of the vehicle and by the shock absorbers which limit axle movement during rebound.

Ride control is provided by two identical direct double acting shock absorbers angle-mounted between brackets attached to the axle housing and the rear spring seats.

 
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