Ford 2003 Mustang Workshop Manual page 2264

SECTION 307-01: Automatic Transaxle/Transmission
DESCRIPTION AND OPERATION
Transmission Description
The 4R70W has the following features:
Wide ratio gears
Four speeds
Rear wheel drive
Automatic
Electronic shift
Torque converter clutch control
Line pressure controls
The transmission uses Ravigneaux-style double-pinion gearset with two bands, one one-way roller
clutch, one mechanical diode and four friction clutches to produce four forward gears and Reverse.
4R70W Automatic Transmission
2003 Mustang Workshop Manual