FORD 2005 Expedition v.2 - Manual (Page 363)

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
B Four-speed automatic (4R75E)
2005 Expedition (exd)
Owners Guide (post-2002-fmt)
USA_English (fus)
Maintenance and Specifications
363