Ford 2013 F-650 Owner's Manual page 283

282 Capacities and Specifications
TRANSMISSION CODE DESIGNATION
You can find a transmission code on the Safety Compliance Certification
Label. The following table tells you which transmission each code
represents.
Description
Six-speed TorqShift® automatic (6R140)
2013 F-650/750 (f67)
Owners Guide gf, 2nd Printing, March 2013
USA (fus)
Code
P