Quote:

The 489 is fine, just use a solid spacer rather than the factory crush sleeve.

Sheldon



The 742 inner pinion bearing has longer rollers and more closely resembles in size the inner pinion bearing of the dana 60 .

Not that MP has been the poster child of doing things right in the last decade or so but when they made the alum. center section for the 8.75 they decided to use the 742 gear set instead of the 489 gearset , there was obviuosly a REASON for that .

YMMV