XV1063 1973-1977.5 Chevy & GMC 3/4 Ton Dana 44 Front Axle Exploded View

The Dana 44 was the sole front drive axle used by GM from 1973 to 1976 for SUV's, 1/2 ton, and 3/4 ton 4x4 vehicles. In 1977, GM started to replace the Dana 44 with the all new corporate, 10 bolt, 8-1/2" Ring Gear, beam type solid 4x4 front drive axle, however, the Dana 44 continued to be used by GM to the 1980 model year after which it was dropped entirely from the GM lineup. For the Dana 44, 1977-1/2 also marked a change in the hub and spindle design for all models.

3/4 ton K20/K25 vehicles had a major hub design change during the 1977 model year. The early trucks have a wheel hub that is drilled and tapped on it's outboard face in order to bolt on either a solid drive flange (full time) or external mount plastic dial Spicer hub lock (part time). Later production axles all used the internal spline type wheel hub similar to what was used on the 1/2 tons.

For the wheel seal and inner bearing, 1977 is the transition year where you could have either early or late bearing types. The two types are not interchangeable!

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XV1063 1973-1977.5 Chevy & GMC 3/4 Ton Dana 44 Front Axle Exploded View