Where is the pinion seal and how do I tighten it on 1998 Dodge Durango

All I know is its in the rear axl

2 answers
It needs to be replaced. Little more than a diy project. Have it done! Now, If you were told the seal is leaking 'because' the pinion itself is loose, that is another problem altogether!! Any noise from rear end?
do not do this yourself or you will be sorry