When pressing the brake pedal the rear brakes lock up?

1993 PONTIAC GRAND AM
95,000 MILES • 4 CYL • FWD • AUTOMATIC
Avatar
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
When I push on the brakes, the rear brakes (ABS) lock up. I inspected the brake pads and shoes along with the drum and rotors and all are fine. I suspect the proportioner valves in the master cylinder. Am I on the right track or is there something else I need to be looking into? Thank you.
Oct 20, 2010 at 9:07 PM
Advertisement
Avatar
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
Replace the rear brake shoes, return springs, and check the size of the drums. If oversized, replace them.
Oct 20, 2010 at 9:09 PM