If it's truly an Allison then it's a hydraulic type of automatic with a torque converter. I'd rather have an auto shifting manual transmission with a true clutch. More gears and more strength and less loss of power than a hydraulic auto. The auto shift transmissions are cool. Don't trust the salesman to know what type of transmission is in it. Some of them don't know what they're trying to sell. Some are good and know about these trucks though. One of the places I went to and took one for a test drive the salesman didn't know about the transmission. It was a 3 pedal 10 speed autoshift. He didn't know if I should push the clutch in when I came to a stop. Hhhhmmmmmm.
'03 Freightliner FL112, 295" wheel base, with '03 United Specialties 26' living quarters, single screw, Cat C12 430 h/p 1650 torque, Eaton 10speed , 3.42 rear axle ratio