Pinion Seal: GM 10 Bolt (8.5 ring gear)- Various 63-81 GM TECH Help:

TECH Help:

These are normally Stock inventory parts

350ci w/o Aftermarket filtration improvement 1976-1976

Its screwed into the housing shown below at the underside RHS of the throttle body

note the three bolt mount positions for the pulley's

Pinion Seal: GM 10 Bolt (8.5 ring gear)- Various 63-81 GM TECH Help:READ DESCRIPTION ON LOWER LHS FIRST: For most actual 10 bolt rear ends .. that have a 8. 5" inch ring gear.. Double Lip Design Inside Diameter 1. 739 in. Inside Diameter 44. 170 mm Thickness 0. 593 In. Thickness 15. 060 mm Outside Diameter 3. 270 in. Outside Diameter 83. 060 mm BUICK CENTURION 1971 1972 BUICK ELECTRA 1972 BUICK ESTATE WAGON 1971 1972 BUICK GRAN SPORT 1965 1967 BUICK GS 1972 BUICK GS 350 1968 1969 BUICK GS 400 1968 BUICK LESABRE 1971