alright so my truck had bad ball joints, figured id change the u joints while in there. drivers side went well, passenger side not so much. could not get the hub out of the knuckle. unded up having to split the knuckle from ball joints and taking the hub and knuck off as one. while being carfull not to pull the axle out of the gear case. got it all back together including a new hub as the old one got trashed. took it for a 5 mile loop parked it all was good. checked today and i got a drop of gear oil on the ground. it is possible some leaked out while i had the axle out, but none leaked on ground while working on it. plus what little that could have came out should take days to show up not 12hrs. how much of a job is it to change the inner seals?