Ford F-150 2005 Owner's Manual page 300

Maintenance and Specifications
Transmission/Transaxle code designations
You can find a
transmission/transaxle code on the
vehicle certification label. The
following table tells you which
transmission or transaxle each code
represents.
Code
A
B
M
300
2005 F-150 (f12)
Owners Guide (post-2002-fmt)
USA (fus)
Description
Four-speed automatic (4R70E)
Four-speed automatic (4R75E)
Five-speed manual (M5R2)