I looked for my ratio post, could not find it and search, any search is not my best friend, so as a last ditch efford to find the ratios, I checked my notes, yep they were there, so hear they are, also as a side note, a power divider OR a interaxle differential could be had for number 2 axle, Bobber builders take note, a 2 speed rear axle (vacuum or air operated) could be had for 2 axle trucks.
Ratios that could be had for double reduction, top loader Rockwell axles,
4.92, 5.21, 5.45, 5.78, 5.81, 6.44, 6.80, 7.54, 8.30, 8.31, 9.20, 9.26, 10.26
6.44 --- used in most 5ts
10.26 -- used in the Honest John mobile launcher
These axles were in everyday heavy medium to heavy trucks use for years before the modern trans and axles showed up, (crane carriers, logging trucks, qurry trucks, heavy haul, heavy line haul, ect., ect., ect., ect
The sad thing about all this neet stuff is that about the ONLY place you find any is in a OLD big truck junk yard.