I just noticed recently the yoke on the transfer case coming from the power out to the rear diff has developed a slow leak. If I remember correctly that yoke had a pretty good wear groove on it. I haven't pulled the yoke yet to see what the deal is, but I'll let you guys know if the sleeve is at fault or not. Could be a small metal burr that I missed that damaged the seal. Anyway, I could conjecture all day. I'll let you guys know.