Cadillac 1949 – 1955 except CC.

GMC Truck  S, T, X, Y  D63, DFM66 All Diesel – At flywheel housing Large hole – Generator drive oil seal,

GMC Truck  J, N  DFI, DFW170, DLR80 – At flywheel housing Large hole – Generator drive oil seal.

Oldsmobile 1954-1955 – *Used on 1954 models that have 1955 axle housings installed.

Pontiac 1955 All.