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Message: <blockquote data-quote="1badtib" data-source="post: 988932" data-attributes="member: 16685">Okay so i have a 96 mustang gt. When i first got the car, brakes were junk. I had to press it almost all the way to the floor before it would start to stop. If i jabbed it really fast, it would catch like normal brakes but if i pushed slow, it would go almost to floor.I then replaced the master cylinder. and the pedal felt great. I tried to bleed rear calipers but the fluid would just dribble out. I figured hmm must be alright so i didnt bleed the fronts. This led me to driving down the road to have the front brakes locking up on me.I got home and bled all the brakes. It happened again. just the fronts would lock up. At this point i replaced the rear calipers because they wouldnt bleed properly. The rears were in fact toast. I also replaced the rear rubber lines with new ones. Bled all 4 corners and master and they eventually locked just the fronts.I then swapped out the master for another new one and same thing. I then swapped hydroboost from one from a junkyard. Same thing. I then bought new front calipers thinking maybe since the rears were toast maybe fronts were. Same thingJust to highlight, I have replacedmaster cylinder twicehydroboostall 4 calipers and rear rubber linesI did notice after i swapped hydroboost and masters, that when bleeding rear calipers, they were perfect right off the bat. However the fronts had air in them.I do know that the steering rack and the bottom of engine is covered in oil. Assuming from oil pan.I also noticed when i popped the hood to crack the master bleeders so it would relieve pressure that one of the hydroboost lines were bubbling just slighly. right where the rubber line connects to hard line beside the master. Would this do anything?The way the brakes lock is they are fine for a little driving, the more i use the brakes though, the tighter they get to eventually they are on all the time.</blockquote>