REAR AXLE FIELD IDENTIFICATION Axles are manufactured by Buick Chevrolet Buffalo Chevrolet Warren Chevrolet Gear and Axle Oldsmobile Pontiac and McKinnon Divisional Manufacturer code letters will be metal stamped on the axle tube adjacent to the carrier for field identi I fication See example Metal stamped on right front inboard side letters and numerals 1 4 high 3 outboard of carrier or are located on a metal tag attached to cover bolt Reference should be made to divisional service manuals for location on some models FIELD IDENTIFICATION MINIMAL REQUIREMENTS FOR IDENTO PLATE NK B 218 D W LIMITED SLIP IDENT G8O OPTION W BORG WARNER RATIO E EATON CODE O OLDS MANUFACTURER IDENTITY DAY OF YEAR AXLE BUILT D DAY SHIFT W N NIGHT SHIFT MANUFACTURER IDENTITY B BUICK G CHEVROLET GEAR AND AXLE O OLDSMOBILE C CHEVROLET BUFFALO P PONTIAC K GM OF CANADA ST CATHERINES M PONTIAC CANADA MCKINNON W CHEVROLET WARREN MANUFACTURERS IDENTIFICATION WILL APPEAR IN THE DESCRIPTION COLUMN OF CATALOG EXAMPLE 82 A B C W 80 488333 2 PLATE DIFF PRELOAD P M TYPE O 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS CHEVROLET 17F 48 REV 6 88