Cutlass L4-138 2.3L VIN A FI HP (1990)
Suspension Spring ( Coil / Leaf ): All Technical Service Bulletins
Suspension - Thud/Clunk Noise From Rear of the Vehicle
NUMBER:
91-T-188
CORP.REF.NO.: 133403
DATE:
September 1991
SECTION:
3
SUBJECT
REAR SUSPENSION AUX SPRING THUD/CLUNK
LOWER ATTACHING BRACKET POSITIONING
MODELS/YEARS
1989-91 CUTLASS SUPREME
CONDITION: Some 1989-91 Cutlass Supremes equipped with auxiliary rear springs may exhibit a thud/clunk type noise coming from the rear of the
vehicle that is audible in the passenger compartment. This condition is most apparent after a harsh/sharp road input such as a chuck-hole/speed bump.
CAUSE: Auxiliary rear spring lower attaching bracket not in full contact with rear spindle rod. Under certain operating conditions lower attaching
bracket may flex and contact spindle rod resulting in thud/clunk noise.
CORRECTION: Following the service procedure indicated, insure that the auxiliary rear spring lower brackets are properly seated on spindle rods.
