Front brakes slowly locking up after a couple miles. Brakes get tighter and tighter the further I go. Took the truck to the dealer and they wanted 2500 to replace MS, rotors, pads and calipers. I replaced all those parts myself, NAPA $300, bled the system extensively, but still having the same problem. Also replaced the rubber brake lines. Brakes will be back to normal in the morning> Any ideas would be greatly appreciated.

 

Maybe some other problem in the hard lines. I start replacing them, they are cheap.