8 3/4 question

The small bearing diameter is the same with all three and this is were the pinion would break if it did.

The inner bearing is largest on the 742 so it will carry more load.

Also why would MP make the aluminum center section out of the 742 style casting if it wasn't the strongest?

The tapered pinion was invented for ease of manufacturing... it is easier and faster to set pinion bearing pre-load with a crush sleeve instead of shims.


Chuck