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:
Water Bypass Hose - 3.8L
Removal and Installation
1. Drain the engine coolant. For additional information, refer to Cooling
System Draining, Filling
and Bleeding in this section.
2. Remove the bypass hose.
3. To install, reverse the removal procedure.
4. Fill and bleed the co ...
Pinpoint Tests
PINPOINT TEST A: THE ENGINE DOES NOT CRANK AND THE
RELAY DOES CLICK
Test Step
Result / Action to Take
A1 CHECK THE VOLTAGE TO THE STARTER RELAY
YesGO to A2 .
No
REPAIR circuit 1050 (LG/VT) for an open. TEST the
system for normal operation. ...
Spring Codes
The spring code portion of the vehicle certification (VC) label identifies
both the front and rear springs.
The first letter/number indicates the front spring code. The second
letter/number indicates the rear
spring code.
Front springs - base part numbe ...
