NHTSA recall 85V048000
Service brakes, hydraulic › Foundation components › Drum › Wheel cylinders
Buick Century and 11 more
Reported Apr 29, 19851,810,000 vehicles affectedGENERAL MOTORS CORP.
The defect
Excessive enlargement of the wheel cylinder pilot hole in the rear brake backing plate could allow the wheel cylinder to rotate and cause loss of brake fluid. consequence of defect: a loss of brake fluid leads to loss of rear brake action, creating the potential for an accident. front brakes would remain operational.
The remedy
Add a part to prevent wheel cylinder from rotating.