1973-81 Rear Differential - GM 12 Bolt with 8-7/8" Ring Gear and 30 Spline Pinion
Truck 12 Bolt
Series 2 = 2.73 - down (smaller numerically)
Series 3 = 2.76 - 3.42
Series 4 = 3.73 - up (larger numerically)
Vehicle Application
Includes Parts for the Following Models:
1973 Chevy C10 Pickup 1974 Chevy C10 Pickup 1975 Chevy C10 Pickup 1976 Chevy C10 Pickup 1977 Chevy C10 Pickup 1978 Chevy C10 Pickup 1979 Chevy C10 Pickup 1980 Chevy C10 Pickup 1981 Chevy C10 Pickup 1973 Chevy K10 Pickup 1974 Chevy K10 Pickup 1975 Chevy K10 Pickup 1976 Chevy K10 Pickup 1977 Chevy K10 Pickup 1978 Chevy K10 Pickup 1979 Chevy K10 Pickup 1980 Chevy K10 Pickup 1981 Chevy K10 Pickup 1973 GMC C15 Pickup 1974 GMC C15 Pickup 1975 GMC C15 Pickup 1976 GMC C15 Pickup 1977 GMC C15 Pickup 1978 GMC C15 Pickup 1979 GMC C15 Pickup 1980 GMC C15 Pickup 1981 GMC C15 Pickup 1973 GMC K15 Pickup 1974 GMC K15 Pickup 1975 GMC K15 Pickup 1976 GMC K15 Pickup 1977 GMC K15 Pickup 1978 GMC K15 Pickup 1979 GMC K15 Pickup 1980 GMC K15 Pickup 1981 GMC K15 Pickup