I'd say leak is worth fixing and that shouldn't be all that bad of a repair. Drop the drive shaft, pull the yoke and pop in a new seal should be a nice Saterday afternoon job.
If you don't you're gonna just be under there wiping that goop off the rear end every week or so.
If your asking if it's gonna hurt anything, suppose not just check the level every so often.
Can't help ya on that Posi, to new for me.

Denny Graham
Sandwich, IL


Denny G
Sandwich, IL