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:
Inspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical and electrical damage.
Visual Inspection Chart
Mechanical
Electrical
Fuel tank
Engine coolant level
Accessory drive belt
Engine oil level
Par ...
Evaporative Emission Canister
Removal and Installation
1. WARNING: The evaporative emission system contains fuel vapor
and condensed
fuel vapor. Although not in large quantities, it still presents the
danger of explosion or
fire. Disconnect the battery ground cable from the bat ...
Starter Motor - 3.8L
Removal
WARNING: When servicing starter motor (11002) or carrying out other
underhood work in
the vicinity of the starter motor, be aware that the heavy gauge battery
input lead at the starter
solenoid (11390) is "electrically hot" at all times. A prote ...
