FORD 2011 F-550 v.4 - Manual (Page 414)

TRANSMISSION CODE DESIGNATIONS
You can find a transmission code on
the Safety Compliance Certification
Label. The following table tells you
which transmission each code
represents.
Description Code
Five-speed automatic (5R110W) T
Six-speed automatic (6R140) P
Maintenance and Specifications
414
2011 F-250/350/450/550 (f23)
Owners Guide, 4th Printing
USA (fus)