10 bolt 8.5 GM rear axle teardown

Finally getting around to the teardown of the rearend off the 1978 Pontiac Firebird Formula W72 400 4 speed car. corporate ten bolt 8.5 gears 28 spline axles.. to be upgraded with a different set of gears and bigger 30 spline axles along with new Eaton style Limited Slip differential ( Posi ) Safe-T-Track