What are the rear axle codes for a 1988 ford f-150?

The rear axle codes for a 1988 Ford F-150 can be found on the Vehicle Certification Label (VCL) located on the driver's side door jamb. Common axle codes for that year include "1" for a 3.08:1 ratio, "2" for a 3.55:1 ratio, "3" for a 3.73:1 ratio, and "4" for a 4.10:1 ratio. Additionally, the truck may have either a standard or limited-slip differential, which can also be indicated by the axle code. For precise identification, it's best to refer to the specific VCL or the vehicle's owner’s manual.