Nice thing with DANA is everything is set by shims. Unscrew the pinion nut , remove yoke , install new seal , reinstall yoke and tighten nut. No worries about crushing a crush sleeve and getting the preload too tight.
The thing I would want to know is why is the seal leaking? Is it just a worn out seal, or is a bearing starting to go causing the seal to leak.

Pat


" The last official act of any goverment, is to loot the treasury" George Washington