Brakes not releasing

[Buffalo444]

alright, got some problems with the brakes. Seemingly at random, they will "lock up" so to speak. The brake pedal becomes extremly firm and the truck runs like someone is applying the brakes constantly. For example, normally I can put it in drive or reverse and the truck will roll at an idle, now it just kinda "leans" forward or backward and holds still. Is there some sort of valve or something that would be causing this?

Edit: It's not the calipers sticking, it has 4 new calipers, 3 new caliper mounting brackets, and all new caliper pins. I heard something about the type of grease used causeing the boots on the caliper pins to swell and act like the brakes are sticking. Would this only be under high temps or something? I used high temp grease (reddish stuff) in the caliper pins, the same stuff i used in my front locking hubs. Any ideas?

[Buffalo444]

bump

[tubular031]

e-brake?

pull the tires and press a little of the calipers back with a big c clamp. Next grab the caliper and make sure it can move freely on the slide pins. I just put new pins and lubed them up on the back then a few months later one of thepins was. Turns out I did not put the boot on right and water got into the pin and rusted it in place. oops my bad.... The new one is installed right!

[Buffalo444]

Not e-brakes, had the whole truck up on jacks and had difficulty with all four tires. Luckily I've got a friend with access to mitchell on demand (lol) and used its diagnosis to determine that it is due to a faulty brake-booster that somehow builds up pressure and is locking up all the brakes. Ordered a new hydro boost unit and will be picking it up tomorrow. R&R will be in my build thread!

[tubular031]

Wow that is a goofy issue. Never heard of that before. Thanks for the update, I would have never thought to check that.

[Jarrod B]

havent heard that before lol

[Galaxie]

I mean, if it was happening to me, I would re check all the slide pins. Besides that.....

[Buffalo444]

Originally Posted by Galaxie

I mean, if it was happening to me, I would re check all the slide pins. Besides that.....

cant be the slide pins, being as it is inconsistant. If they ALL seized, they wouldnt randomly all come undone either.