Well back in my beer delivery days we would pretty much run the higher gears up to the governor, if your thinking about 900R - 22.5 tires then I would go with the 5:29 axle, I wish I could tell you what axles we had. As a comparison, in the OTR trucks we ran back and forth to Columbus in, we had anywhere from 307hp to 350 hp, 9, 10, and 13 speed trannies. We were maxed out at 80,000 lbs on the haul north, 3.90:1 twin screws, but of course with diesel that made their torque at 1700 - 1900 RPM, with the governor at about 2100. The 350 Cummins with a 9 speed hardly new it had a load.
