Lincoln 2005 Town Car Owner's Manual page 321

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
H
W
320
2005 Town Car (tow)
Owners Guide (post-2002-fmt)
USA_English (fus)
Description
Four-speed automatic (4R70E) – Sharonville
Four-speed automatic (4R70E) – Livonia