Differential Assembly: Application and ID

All corporate rear axles are identified by a broadcast code on the right axle tube near the carrier. The rear axle identification code and manufacturer's code must be known before attempting to adjust or repair axle shafts or the rear axle case assembly. Rear axle ratio, differential type, manufacturer, and build date information is stamped on the right axle tube on the forward side. The first three digits indicate the rear axle ratio. The next digit indicates the axle assembly build source code: (C) Buffalo and (K) Canada. The next three digits indicate the day built, displayed in Julian Date form. The last digit indicates the shift: (1) First and (2) Second. Any reports made on rear axle assemblies must include the full code letters and build date numbers.