Chevy & GMC Front Axle ID

All 1977-1991 Dana 60 Front Axles in GM 1 ton 4x4 trucks had a Bill of Material Number (BOM) assigned by Dana at the time of manufacture. Th BOM number on 1984-1991 axles is stamped on a Build Tag attached to the differential by two of the differential...

Dana 44 Beam Type Axles have 10 bolt covers that are approximately 10-3/8" high and 9-3/8" wide. For most applications, the bolt head size is 1/2" and the bolt thread is 5/16 USS coarse thread. Early covers (up to the mid 1970's) are made of thin steel...

Many Dana Axle have the model number cast somewhere on the cast iron differential housing.

Starting around 1965, Dana started using metal tags affixed to the differential cover by two of the cover bolts. Each tag has a Bill of Material Number (BOM) stamped on it and it is affixed to the axle before it is shipped from the factory. The photo...

ID Your Dana Closed Knuckle Front Axle Ball Type. Dana-Spicer produced closed knuckle front drive axles from 1941-1979. These axles have a Ball welded to the outer end of each axle tube. The Ball is open at the outboard end and the top and bottom...

We are often asked how a customer can identify if their 4x4 has a Standard-Duty 3/4 ton Front Axle (Dana 44 or GM 10 Bolt) or a Heavy-Duty Axle (Dana 50IFS, Dana 60, Dana 61). There are several ways, but if your axle has an internally splined hub, the...

You will often see a 4x4 beam-type front axle referred to as a "Closed Knuckle" or "Open Knuckle" axle. What does this mean? In simple terms, the steering knuckles are the parts that pivot at the ends of the axle beams when you turn your steering wheel...