changed out my rear wheel cylinders on my 3/4 ton this past weekend. I tried to adjust the star wheel on the passenger side and it wouldn't budge. Finally gave up and bought a new one. Took the old one and put it in a vise. grabbed the star with some vise-grips and it still wouldn't budge. Finally hit it with the air chisel and got it to move. the only reason I worked on the brakes was to change out the rear wheel cylinders, didn't have any other brake problems. Funny, when I went to the auto parts store, the passenger side star wheel is the only one they stock. And when I walked through the door, the guy behind the counter new exactly what part I had in my hand and what kind of truck it came off of. he knew it was a 3/4 or 1 ton too.