1992 REAR AXLE IDENTIFICATION 1992 S TRUCK 7 50 R GR REAR AXLE ASSEMBLIES ARE MANUFACTURED IN EITHER ST CATHERINE CANADA OR BUFFALO NEW YORK BOTH AXLE ASSEMBLIES HAVE THE SAME PART NUMBER AND FIRST THREE LETTER STAMPING CODE REFER TO THE FOURTH LETTER OF THE CODE TO DETERMINE WHERE THE AXLE ASSEMBLY WAS BUILT REAR AXLES WITH A STAMPING CODE FOURTH LETTER OF K ARE MANUFACTURD IN ST CATHERINE CANADA AND REAR AXLES WITH A FOURTH LETTER OF C ARE MANUFACTURD IN BUFFALO NEW YORK DEPENDING UPON MANUFACTURING LOCATION DIFFERENT REAR AXLE HOUSING ASSEMBLIES AND WHEEL BEARING SEALS ARE REQUIRED USE THE FOLLOWING PART NUMBERS TO SERVICE THESE AXLES FOURTH HOUSING SEAL LETTER K 26024326 26029139 C 26023822 26029137 ALL OTHER 7 50 R GR AXLE ASSEMBLY PARTS ARE COMMON AND INTERCHANGEABLE 1992 GENERAL MOTORS SERVICE PARTS OPERATIONS LTTRUCK 53S T 92 5 11 5 335