FORD 2006 F-550 v.1 - Manual (Page 303)

Code Description
5 Six-speed manual, Dana (ZF S6–650)
7 Six-speed manual, Dana (ZF M6HD-W)
T Five-speed automatic, TorqShift (gas engines)
B
Five-speed automatic, TorqShift (diesel
engine)
2006 F-250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA (fus)
Maintenance and Specifications
303