I had a bad front diff axle oil seal after getting a u joint fixed. Often if you pull the axle to work on the u joint it can damage the diff seal. To fix it the mechanic rigged up a piece of allthread with a grommet on the end to hold the new seal, got it done without opening the diff. Hope you can be so lucky too.

 

Just double checked the Ujoint, its in badd shape...So now I need to find the DIY and get r done