Ford 2003 Mustang Workshop Manual page 2286

SECTION 307-01: Automatic Transaxle/Transmission
DESCRIPTION AND OPERATION
Geartrain
Power is transmitted from the torque converter to the Ravigneaux geartrain components through the
input shaft and forward clutch cylinder.
The geartrain contains a Ravigneaux planetary set connected by dual pinion gears.
By holding or driving certain components of the gearset, four forward ratios and one reverse
ratio are obtained and transmitted to the output shaft. The ratios are as follows:
Gear Ratio
1st 2.84 to 1
2nd 1.55 to 1
3rd 1.00 to 1
4th 0.70 to 1
Reverse 2.32 to 1
Components of the geartrain can be held by bands or clutches and driven by clutches only.
The 4R70W uses:
two bands.
two one-way clutches (one roller, one mechanical diode).
four friction clutches.
Planetary Gearset
The planetary gearset in the transmission is a Ravigneaux-type set consisting of the following
components:
forward clutch sun gear
reverse clutch sun gear
a pinion carrier
long and short pinions
output ring gear
Components are held or driven to produce forward and reverse gear ratios.
Input Shaft
The forward clutch cylinder and shaft transfers speed and torque from the converter turbine to the
geartrain. This shaft is splined to the turbine on one end and to the forward clutch sun gear and stub
shaft on the other end.
2003 Mustang Workshop Manual