onfire

iTrader: (17)

When do you need the upgrade from 5 to 10 bolts?

chicane

Only when you are going to use a pinion support that can utilize them. Most of which are only going to be the pinion supports used specifically for the "high impact" gear sets. They have a different pinion shaft diameter and use much larger bearings. Well... that, and the fact that the case has to have that feature as well.