weakndmchjim

I need to change my disk pads on the rear of my 89 GTA, but there is a difference between the rear and front. Haynes is not very detailed, it says take off the emergency cable and lay over the caliper to take out the pads, then do the reverse to put it together. That is not helpful since I've never changed the rear. I would like some detail, like what bolts to remove, do I take off the spring for the e-brake, etc? Are there instructions out there that I can get my eye on to help with the task?

JamesC

iTrader: (5)

Welcome to TGO. A search on site is always good advice as most questions have been asked and answered.

1989-92

1. Remove 2/3 of the brake fluid from the master cylinder reservoir.
2. Raise and safely support the vehicle.
3. Remove the wheel and tire assembly. Install 2 wheel nets to retain the rotor.
4. Position a C-clamp and tighten until the piston bottoms in the base of the caliper housing. Make sure 1 end of the C-clamp rests on the inlet fitting bolt and the other against the outboard disc brake pad.

It is not necessary to remove the parking brake caliper lever return spring to replace the disc brake pads.

5. Remove the upper caliper guide pin bolt and discard.
6. Rotate the caliper housing. Be careful not to strain the hose or cable conduit.
7. Remove the disc brake pads.

To Install

8. Clean all residue from the pad guide surfaces on the mounting bracket and caliper housing. Inspect the guide pins for free movement in the mounting bracket. Replace the guide pins or boots, if they are corroded or damaged.
9. Install the disc brake pads. The outboard pad with insulator is installed toward the caliper housing. The inboard pad with the wear sensor is installed nearest the caliper piston. The wear sensor must be in the trailing position with forward wheel rotation.
10. Rotate the caliper housing into its operating position. The springs on the outboard brake pad must not stick through the inspection hole in the caliper housing. If the springs are sticking through the inspection hole in the caliper housing, lift the caliper housing and make the necessary corrections to the outboard brake pad positions.
11. Install a new upper caliper guide pin bolt and tighten to 26 ft. lbs. Tighten the lower caliper guide pin bolt to 16 ft. lbs.
12. With the engine running, pump the brake pedal slowly and firmly to seat the brake pads.
13. Check the caliper parking brake levers to make sure they are against the stops on the caliper housing. If the levers are not on their stops, check the parking brake adjustment.
14. Remove the 2 wheel nuts from the rotor and install the wheel and tire assembly.
15. Lower the vehicle, check the master cylinder fluid level and road test the vehicle.

JamesC

trumps2000

iTrader: (2)

Hi James, I'm upgrading to PBRs and am wondering if you could shed some light on my problem. I have LT1 calipers (w/o damper) and backing plates and LCA relo brackets. It looks as though I can't rotate the caliper. Is that just the way it is given my setup?

Ken

JamesC

iTrader: (5)

As far as I know, there's no way to clock the calipers differently than OE (back side of the rotor).

JamesC

trumps2000

iTrader: (2)

Alright so I didn't do anything wrong? Guess this is life when modifying multiple things.

JamesC

iTrader: (5)

The pics and/or info in the following link may be helpful if you haven't seen it:

https://www.thirdgen.org/forums/faq-...iscs-89-a.html

JamesC