Hello All, so my trucks front brakes were sticking and burning in the spring so I had my mechanic install new calipers and hoses. Drove it a few miles and it did it again, so under warranty the calipers got replaced again. It had only stuck on me once more before summer and all summer was fine . My truck is not a daily driver and maybe gets 1,000 miles a year hauling firewood and some building materials. So all through summer it was fine and this morning was 40 outside and the front passenger was cooking again on my way into work! So could this be bad fluid a bad master cylinder or a proportioning valve?Any ideas would be grate. The truck is a 1989 w 250 4x4 auto with the Cummins motor. Also the slave cylinder was replaced two years ago because it was not returning the brake pad to its regular position.