on a hot day if im driving around my brake pedal will get really hard, and let's say im doing about 25 30 mph all i have to do it hit the pedal once and she will come to a complelte stop on it's own then stay there. and i can slowly feel the calipers releaseing allowing me to roll, (5 speed) or sometimes it seems to stay locked, also she will pull hard to the left when this happens and pull to the right sometimes

im hopeing it is just air or the calipers that's not a problem to me. if it's the booster, the master cylinder or the B.P.V then that's another story

Thanks

 

master cylinders are actually pretty easy, but anyway if you have rear discs it might have to do with a recall on all rear disc m5's from 82-88, do a search on this board for more info

 

Sorry forgot to mention rear drum