The trannsmission is original 80,000 miles so it's probably not a mismatched tranny.

Havent actually opened up the fill hole on the Differential. Just inpsected it for leaks. None found. Maybe I will try that tonight, it's an idea, but a long shot.

Transfer clutch? Is that the same as transfer plates? Or am I missing something? Again not to versed in AWD systems.

Aredubjay did you used LSD additive? If so did it work, and downfalls, what types? Thanks for all the help so far guys. It's appreciated. Any body else have any ideas?