More than likely it's a 1 1/2 ton, if it's a Chevy.Especially if you say it's a 2 spd. rear axle. No one ton truck would have had one. Chevrolet didn't list a 2 ton rated truck until 1946. Can you write the ID (VIN) Plate info., on a piece of paper. It would definitely help to ID the truck. If he doesn't have the Ton rating correct, how do you know he has the year model correct.

Spanky Hardy
Collector Of Fine Old G.M. COE Trucks & Antique Holmes Wreckers

1948 Chevrolet 5700 COE Holmes HD W35 Wrecker
In the Stovebolt Gallery
More pictures on Photobucket

1950 GMC 250 1-Ton
In the Stovebolt Gallery