1.5 tons are usually single speed axles, and 2 ton is most often 2 speed in these years.

It is common to find faster ratio in the single speed than in the 2 speed, and the gears alone are not interchangeable, though the complete axle assembly would be.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-