Firebird V8-305 5.0L VIN E TBI (1989)
Brake Caliper: Customer Interest
Brakes - Moan From Rear Discs
Bulletin Number:
89-5-10
Reference Number:
935002R
Publish Date:
5/89
REAR DISC BRAKE MOAN (NEW CALIPER Subject: MOUNTING PLATE)
Models
Affected:
1989 FIREBIRD WITH REAR DISC BRAKES (J-65)
Some comments have been received concerning rear disc brake moan on Firebird models with J-65 rear disc brakes. This moan is more noticeable when
backing up and turning with the brake slightly applied. A revised caliper mounting plate has been released for production after the following breakpoints:
Pontiac
VIN
Options
KL245264
G80
GM3
MK3
KL245323
G80
J65
If this condition is experienced on a vehicle built prior to these VINs, a new caliper mounting plate is now available from service. The brake pads should
also be replaced and the park brake cable tension properly adjusted.
FIGURE 1 - NEW BACKING PLATE
Procedure:
1.
Prep vehicle and remove 2/3 of the brake fluid from the master cylinder.
2.
Raise vehicle and remove the rear wheels and tires.
3.
Remove the rear brake calipers and rotors.
4.
Remove the eight bolts retaining the axle shafts and the backing plates. Discard the old lock nuts.
5.
Remove the axle shafts using tool # J-21579.
6.
Install the new backing plates and axle shafts (See Figure # 1). Use new lock nuts. Torque bolts to 41-54 N-m. (30-40 ft.lbs.).