FORD 2005 F-150 v.3 - Manual (Page 302)

7. Assembly plant
8. Production sequence number
Engine number
The engine number (the last eight numbers of the vehicle identification
number) is stamped on the engine block and transmission.
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 Description
A Four-speed automatic (4R70E)
B Four-speed automatic (4R75E)
M Five-speed manual (M5R2)
2005 F150 (f12)
Owners Guide (post-2002-fmt)
USA_English (fus)
Maintenance and Specifications
302