driveshaft dont leak.they are filled with grease.driveshaft gearbox differentials seals leak.if this is the case,then the relevant suspension has to be partially dissmantled to permit removal of shaft and then removal and replacement of diff oil seal.not a five min job.possible if capable diy'er.but not fun.allthings going well,say 1-1.30 hours garage time plus oil and seal.unless it's off side then add 1 hour.
caine
August 2008