According to the reprint of the Chevrolet Truck Shop Manual 1948-50 2-speed axles had 6.13 & 8.10. It doesn't show ratios for '51-up so I would assume nothing changed.
2-tons with 1-speed axle were 6.17.


"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.