I have a wrangler 2009 with a front dana 30 and a rear 44 with no locker ,im due for differential oil change and i have 2 jug of motul gear oil 75w90 fully synthetic,i know its overkill for the use but will it be safe to use in a dana differential?
Should be a-okay. Being a dana 44 does it have a lsd in the rear? You said "no locker" wasn't sure about a clutch LSD.
If so, look into weather the Motul needs modyfier or not...probably not. Otherwise, it'd be great to use.
I made a similar switch from Japanese cars to a Jeep TJ last year. I had a Toyota Pickup before so I was bitten. Its been a good move for me, and I find the Jeep more interesting than the cars. Its was a nice change.