The Stovebolt Site Forums The Parking Lot Big Bolts How common are power dividers??

There used to be power divider transmissions used to split power to tandem rear axles. However by 63' these would have been very unlikely and hydraulic pumps were run by PTO's on main transmissions. Your statement that it was C60 with a 16' body makes it all the more unlikely that it would have such a unit as 16' farm bodies are single axles. Dad's truck probably used a 4 speed transmission with a 2 speed rear as that was the common Chevy truck of the day, in fact I had such a truck myself except it was a GMC. Since you were "pretty young" it seems more likely to me that what you recall turning was really the PTO driveline.
Natuarally I can't be sure but this is the most reasonable explanation in my considered opinion.