stanglover0526

I have a 94 Gt that has upgraded brakes off a 99-04 model. When i got the car the front brakes were a little hung up but i thought no big deal the slide pins need cleaned up and regreased. Well yesterday i took it all apart and greased them and took it for a ride and sure enough it didnt fix my problem. Clearly the pistons arent going all the way back in as i found when i took it all apart. Anyone have any ideas? I cant imagine both calipers being bad at the same time? Thanks for any reply

projectresto83

They are not going to go all the way back in. After you install and hit the brakes a few times the pads will drag on the rotors a little

stanglover0526

Thats what its doing but its not a little its actually got pressure on them. I cant drive it far cause the brakes get hot

mattdel

Calipers not releasing is one of two things:

1: Caliper is freezing
2: Rubber hose attached to caliper is collapsing under pressure, locking pressure into the piston. Nearly impossible to see by eye.

On the more extreme side, you could have a malfunction in the master cylinder, but more obvious symptoms would be present in most cases.

Given that you've done the brake swap, however, something could be wrong in the prop(diverter) valve, causing it to act like a line lock.

stanglover0526

Both sides are doing this and i cant emagine both calipers are freezing up. It has russel braided lines so thats out too. How do i check the prop valve? Ive never messed with oith one before.