I concur with this statement, considering he has lockers. Otherwise it would be cross pin.
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There isnt much between anything in a D2 axle. If an axle is twisted or snapped, the diff sun and planetary gears or cross pin will probably be fractured or broken also. Or vice versa. If you've got the rotoflex in, and a breaking them, a standard diff/axle etc isnt too far behind it.