doin a brake job and got all hardware in correctly put all backtogether and drove for 10 mins and was fine....1hr later customer called and said the brakes were locked up and didn't go inreverse cause of the tight brakes, so went back and adjusted the star adjuster and brought them all the way in(which I did the first time also but somehow they were back out) again truck drovefine for a bit and the same problem persists so anybody got ideas??? I'm going there shortly to check the e-brake tightness