Has anyone ever replaced the brake line from the master cylinder to the rear of car for rear brakes? I would like to know if it can be pulled out through the tunnel and a new line can be pushed back through, or does the new line need to be attached to the old one and drawn through in that manner? I have a leak in the line in the tunnel and the brake fluid is accumulating in the tunnel. When the car is parked facing down hill, the fluid runs down the tunnel and drains out of a hole in the pan near the frt. crossmember. Skycop, if you read this, you mentioned you had a brake that would not operate on left rear. It could be that you too are losing pressure inside the tunnel with a leaking brake tube.