Are front and rear differential gears cut the same? Example - are a D60 front and D60 rear gears interchangable, or atleast the same cut? What are reverse cut gears and when / where / why are they used? How do high pinion gears (like a Ford D60) differ from from standard gears (GM D60). I know the pinion is higher, I want to know how the gears or cuts of the gears differ. Thanks, Eric M.