Originally Posted by
BashemSmashem
I agree the inserts will leak. If you use the stock grease the wiggle will not be an issue. If you need to seal the stock diff cases for silicone you can RTV the inserts in place. I have never heard of anyone granading gears because of outdrive wiggle. Only the loss of some oil.
The wear is due to the angle of the front shaft and I don't think the outdrive wiggle significantly effects outdrive wear.