Axle Ratio & Identification: Notes

Ratio code or number is stamped on forward side of axle housing tube. This identification is usually found on right tube, but may also be found on left tube, adjacent to differential housing. First two letters designate axle ratio. Third letter designates manufacturer: "B"-Buick, "C"-Chevrolet Buffalo, "G"-Chevrolet Gear and Axle, "K"-G.M. of Canada, "O"-Oldsmobile, "P"-Pontiac. These manufacture codes also denote axle shaft types,- "B" and "O" axles are retained in the axle housing by an outer bearing retainer on axle shaft. "C", "G", "K", and "P" axles are retained in housing by "C" locks, positioned in circular grooves machined near inner end of axle shafts.