air does leak around the threads. it's a constant stream of bubbles that are uniform. i don't think that it's an issue because you're pulling the fluid out, and then tightning the bleeder before you loose vaccume. the trick is being able to decipher air in the line from air at the threads.


94 yj 456gears, detroit locker and 30 spline axles out back, 33" bfgs