Ford Mustang Owner's Manual page 224

Maintenance and Specifications
Passenger car application:
Code
R
W
E
J
L
P
X
Y
5
U
A
224
2004 Mustang (mus)
Owners Guide (post-2002-fmt)
USA English (fus)
Transmission/Transaxle
Description
Front wheel drive manual transaxle
5–speed overdrive (MTX75)
5–speed overdrive (M5)
Front wheel drive automatic
transaxle
4–speed overdrive (4FE)
3–speed (Mazda)
4–speed overdrive (AX4S)
4–speed overdrive (4F20E)
4–speed overdrive (4F50N)
4–speed overdrive (CD4E)
Rear wheel drive manual transaxle
5–speed (Mazda M5)
Rear wheel drive automatic
transmission
4–speed overdrive (4R70W)
5–speed overdrive (5R55N)