Ford Mustang (1999-2004) Service Manual: Shift Point Road Test

This test verifies that the shift control system is operating correctly.

1. Bring engine and transmission up to normal operating temperature.

2. Operate vehicle with transmission range selector lever in (D) position.

3. NOTE: Shift speed ranges are approximate for all applications. For specific applications (engine, axle ratio and application) refer to the Automatic Transmission Specification Issue, available from Ford Customer Service Division.

Apply minimum throttle and observe speeds at which upshift occurs and torque converter engages; refer to the 4R70W Shift Speeds chart in this section.

4. With the transmission in Overdrive (fourth gear), press the transmission control switch. The transmission should downshift to third gear. Release the accelerator pedal; engine braking should occur.

5. Press accelerator pedal to floor, wide open throttle (WOT). Transmission should shift from third to second gear, or third to first, depending on vehicle speed. Torque converter clutch should disengage and then reapply.

6. With the transmission in (D) position and speed above 80 km/h (50 mph) and less than half throttle, move the transmission range selector lever from (D) position to manual 2 position and remove pressure from the accelerator pedal. Transmission should immediately downshift into second gear. With vehicle remaining in manual 2 position, move the transmission range selector lever into manual 1 position, and release accelerator pedal. Transmission should downshift into first gear at speeds approximately below 45-56 km/h (28-35 mph).

7. If transmission fails to upshift/downshift or torque converter clutch does not apply and release, refer to Diagnosis By Symptom in this section.

Shift Speeds 4.6L 4V MACH 1 (3.55:1 Axle Ratio)

Shift Speeds 4.6L 4V MACH 1 (3.55:1 Axle Ratio)

Shift Speeds 4.6L 2V HO (3:27:1 Axle Ratio)

Shift Speeds 4.6L 2V HO (3:27:1 Axle Ratio)

Shift Speeds 3.8L (3:27:1 Axle Ratio)

Shift Speeds 3.8L (3:27:1 Axle Ratio)

Shift Speeds 3.8L (3:08:1 Axle Ratio)

Shift Speeds 3.8L (3:08:1 Axle Ratio)

    Preliminary Inspection
    The following items must be checked prior to beginning the diagnostic procedures: Know and Understand the Concern In order to correctly diagnose a concern, first understand the customer compla ...

    Torque Converter Diagnosis
    Prior to the installation of a new or remanufactured torque converter, all diagnostic procedures must be followed. This is to prevent the unnecessary installation of torque converters. Only af ...

    Other materials:

    Idle Air Control (IAC) Valve - Mach I
    Removal and Installation 1. Remove the air intake scoop. For additional information, refer to Section. 2. Disconnect the idle air control (IAC) valve electrical connector. 3. Remove the bolts, the IAC valve and the gasket. 4. NOTE: Install a new ga ...

    Engine oil check
    Note: Check the level before starting the engine. Note: Make sure that the level is between the MIN and MAX marks. 1. Make sure that your vehicle is on level ground. 2. Turn the engine off and wait 10 minutes for the oil to drain into the oil pan. 3. Remove ...

    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. ...