The ratios available for the 2-speeds are "slow" and "really slow"! These old trucks were way underpowered, and super-low gears were the only way to get the loads moving that they were trying to carry. On the low side of the rear end, nothing above a fast walk was expected for the first 2 or 3 shifts and the top end usually came out around 50 MPH or so. Given the braking systems available and the roads they operated on back then, that was probably a good thing!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!