The GM Truck Specification Packets for 1958 and 1959 are very incomplete and missing lots of pages when conpaired to the 1957 packet.
My 1958 and 1959 Truck Data Book's do not list OD as an option for the 3000 series truck, but the 1959 book does have them listed for the El Camino's (which were part of the truck group).
The serial number page in the specification packet should not be used as proof they were actually installed in the trucks, those pages seemed to be carryovers from the previous year in many cases and are there to inform where to look for a serial number on the different transmissions, not what they were installed in.
Fred, the OD transmissions were the same for the cars and trucks, so there will be OD transmissions with 58/59 date codes. The question is can anyone prove they were installed at the factory in the 1958/59 3100 trucks?
Mike B
