All brakes stuck on

[Dan]

I had a friend stand next to the truck and he could hear both front & rear brakes dragging. My fronts squeak so that was easy to figure out, and the rear was smoking last time it happened yesterday afternoon. And the only way I could move the truck was in 4Lo. 4Hi couldnt overpower it so thats more than 1 wheel braking I'd guess. Im gonna go back out soon and see if the pressure has come off and I can sneak it home and stay off the brake. I'll check out the MC bleeder too, that could help me if I have to stop a couple times and bleed off pressure. Its only a few miles away...

Thanks for the suggestions!
- Dan

[Dan]

Update -

Last evening I went to where I left the truck sitting for a few hours. Started and put into gear and it rolled freely. So the pressure buildup slowly released itself during that sitting period. I was able to get it home without using the brake pedal, just a couple times on the e-brake at intersections and then just rolled thru. Once home I checked the rotors. The front two were cold. The back two were both hot to the touch. Evenly, both about the same hotness. Today Im going to recreate it and see which wheels are stuck so I'm 100% sure of that and go from there.

Still thinking master cylinder. Its not the e-brake because thats mechanical and should have no effect on the line pressure and the pedal becoming rock hard.

[Scarsman]

Originally Posted by Dan

...just a couple times on the e-brake at intersections and then just rolled thru. Once home I checked the rotors. The front two were cold. The back two were both hot to the touch. Evenly, both about the same hotness.

Just a thought, not knowing how long it was from when you used the e-brake till you got home, but the rears being warm could be normal from using the e-brake, as it only activates the rear brakes. Maybe still warm from that? Just a thought.

[Xotik H3]

Originally Posted by Scarsman

Just a thought, not knowing how long it was from when you used the e-brake till you got home, but the rears being warm could be normal from using the e-brake, as it only activates the rear brakes. Maybe still warm from that? Just a thought.

Let it go Dan... it's ok.

[IRA51]

First off there is no vacume booster ,you have hydraboost . Your power steering and brakes are run buy the power steering pump . If you unplug the ABS unit and the brakes work again ,you have an ABS problem .