I've had a S2, RRC and now a D2 and never blown a axle or diff. My old mans S3 did over a million and only one axle and diff. And that was after running for 3 days on 2WD through mud from charleville to birdsville.
I've seen then where they almost had to be screwed out of the diff. Gently on the left foot, I can't afford to replace stuff as it wasn't strong enough to drive up flat out. I'm sure we all can't.

