Ford Mustang (1999-2004) Service Manual: Shift Patterns
Upshifts
Transmission upshifting is controlled by the powertrain control module (PCM). The PCM receives inputs from various engine or vehicle sensors and driver demands to control shift scheduling, shift feel and torque converter clutch (TCC) operation.
Downshifts
Under certain conditions the transmission will downshift automatically to a lower gear range (without moving the gearshift lever). There are three categories of automatic downshifts; Coastdown, Torque Demand and Forced or Kickdown shifts.
Coastdown
The coastdown downshift occurs when the vehicle is coasting down to a stop.
Torque Demand
The torque demand downshift occurs (automatically) during part throttle acceleration when the demand for torque is greater than the engine can provide at that gear ratio. If applied, the transmission will disengage the TCC to provide added acceleration.
Kickdown
For maximum acceleration, the driver can force a downshift by pressing the accelerator pedal to the floor. A forced downshift into a lower gear is possible below calibrated speeds. Specifications for downshift speeds are subject to variations due to tire size, engine and transmission calibration requirements.
Disassembled Views
4R70W Automatic Transmission - Disassembled View
Bushings, Bearing and Thrust Washer Locator
Seals, Rings and Gasket Locator
Main Components and Functions
Transmission Main Components - Sectional View
Range Selection
The transmission has six range positions: P, R, N, (D), 2 and 1.
Park
In the PARK position:
there is no powerflow through the transmission.
the parking pawl locks the output shaft to the ...
Torque Converter (Description and Operation)
The torque converter transmits and multiplies torque. The torque
converter is a four-element device:
impeller assembly
turbine assembly
reactor assembly
clutch and damper assembly
...
Other materials:
Removal
1. Disconnect the battery ground cable. For additional information, refer to
Section.
2. Remove the transmission.
3. Remove the air intake scoop. For additional information, refer to Section.
4. Remove the air cleaner outlet tube. For additional informatio ...
Output State Control (OSC) Mode
Output State Control (OSC) allows the technician to take control of
certain parameters to function the
transmission. For example, OSC allows the technician to shift the
transmission only when he/she
commands a gear change. If the technician commands ...
Vacuum Control Motor - Air Damper Door
Removal
1. Remove the instrument panel. For additional information, refer to Section.
2. Disconnect the vacuum hose.
3. Remove the vacuum control motor.
1. Remove the steel clip.
2. Loosen the nuts.
Installation
1. To install, reverse the removal proc ...
