I've seen parts diagrams of the 8 3/4" that show the pinion depth shims between the bearing cup and the housing OR between the bearing cone and the gear. It looks like both locations were used. Looking in the '70 FSM the shim is between the cup and housing. Anyone have any idea when the change occurred? I can see where the shim between the cup and the housing would allow easier changes but is there any advantage to being between the cone and gear? Thanks!


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