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I just replaced the RR caliper, bled the brakes (RR inner,RR outer, LR inner LR outer, RF, LF). I have good pedal but when applied car pulls to the right then left. On gravel all wheels lock and slide. Anyone have a suggestion to my problem. 1977 4-speed, 383 Stroker. Thanks.
If you're applying the brakes slowly until lock up in the gravel and all 4 wheels are locking up at the same time then I would be looking at worn steering parts. Ball joints and idler arm are the first culprits I would look at!
If it didn't happen before the caliper replacement I would suspect that you have air in the system. I would also suspect that it is in the rear because replacing a rear caliper would not affect the front at all (unless you introduced air when you bled the front). Pulling first to the right would suggest that the brake pads on the right side are engaging the rotors before the brake pads on the left, so I would suspect air in the left side.
If you're applying the brakes slowly until lock up in the gravel and all 4 wheels are locking up at the same time then I would be looking at worn steering parts. Ball joints and idler arm are the first culprits I would look at!
the "wandering" when the brakes are applied does lead me also to feel that is it steering, suspension issues. Brakes can also be involved...but without know what it was doing before you did the rear caliper...we can only guess that it was OK.