You should look really close at the fittings to be sure is isn't just a leak there. If the shaft is indeed leaking out it's seal, it is a bad box. I don't know where they are getting these remanned POS parts these days, but I have only had one brake master work out of the las 8 I have bought and I now need number 9.
I just put a new frame in mine so had to swap over the steering box. One month later the steel line above the fitting on the pressure hose blew out.
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com
(10 new albums added Sept 16/10)