So I just got a 99 TJ and the driver side brake locked up on me. I replaced the rotors, calipers, and pads but the driver side wouldn't bleed or release the brakes. I just ordered some new brake hoses as I found out that could be the issue thanks to this forum now the question is how much brake fluid do I need to fully flush the system? I'm probably going to go with DOT 4 since why not?