Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2004EXPLORER 2WD V6-4.0L VIN EREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLETESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSAIR PRESSURE TESTS
2004 Ford Explorer 2WD V6-4.0L VIN E
Air Pressure Tests
2004 Ford Explorer 2WD V6-4.0L VIN ESECTION Air Pressure Tests
Air Pressure Tests
A no-drive or erratic shift condition may be due to inoperative bands and clutches. To diagnose these conditions a series of checks can be made by substituting air pressure for fluid to determine the location of the damaged or obstructed component.
Follow the procedure to determine the location of the inoperative clutch or band by substituting air pressure into the various test plate passages.
NOTE: Use only dry, regulated air pressure, 276 kPa (40 psi) maximum.
1. Remove the main control valve body. Install the Transmission Test Plate and gasket. Tighten bolts to 10 Nm (89 inch lbs.).
3. NOTE: Do not apply air to the test plate vent hole.
Apply air to the appropriate clutch or servo port (refer to plate layout diagram). Refer to the Air Pressure Test Diagnostic Chart for conditions, possible causes and actions.
4. After the testing is completed, remove the Air Test Plate and Gasket and proceed with any repairs that are needed.
5. After the repairs are completed, install the Main Control Valve Body.
Air Pressure Test Diagnostic Chart
A no-drive or erratic shift condition may be due to inoperative bands and clutches. To diagnose these conditions a series of checks can be made by substituting air pressure for fluid to determine the location of the damaged or obstructed component.
Follow the procedure to determine the location of the inoperative clutch or band by substituting air pressure into the various test plate passages.
NOTE: Use only dry, regulated air pressure, 276 kPa (40 psi) maximum.
1. Remove the main control valve body. Install the Transmission Test Plate and gasket. Tighten bolts to 10 Nm (89 inch lbs.).
3. NOTE: Do not apply air to the test plate vent hole.
Apply air to the appropriate clutch or servo port (refer to plate layout diagram). Refer to the Air Pressure Test Diagnostic Chart for conditions, possible causes and actions.
4. After the testing is completed, remove the Air Test Plate and Gasket and proceed with any repairs that are needed.
5. After the repairs are completed, install the Main Control Valve Body.
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Air Pressure Test Diagnostic Chart
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.