The rear brake line on my 2001 TJ was leaking and I replaced all the brake lines with stainless steel lines. I bled the brakes and the brake pedal feels low and kind of slow to react. The brake warning light is on and the buzzer is going off and on. Bled the brakes again with no change in braking. I drove the Jeep yesterday and I noticed that it is pulling to the left. Also when I brake, the vehicle kind of sways. After a while I felt that the left front brake was dragging. I stopped and saw the left rotor was glowing hot. I had the Jeep towed to my house. It seems that the driver side caliper seized up and stuck. I replaced both calipers and both wheel cylinders cylinders (bleeder screws are stuck). Bled the system and braking improved but then the brake warning light and buzzer is on and off again. The brakes sometimes are low. Sometimes when you step on the brake pedal there is a sound that seems to shift something. The brakes seem to work fine but with low pedal and slow reaction. Is the proportioning valve causing this and needs to be reset? I do not know what is left to replace. I read a lot of tread here about brake issues and I think mine id different. It seems the brake pedal is not solid and hard. Thank you.