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 MANUALSFORD2021EXPEDITION PLATINUM, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 879 (AUTOMATIC TRANSMISSION - 10-SPEED AUTOMATIC TRANSMISSION - 10R80 (DTC CHARTS 5.0L - ASSEMBLY))DIAGNOSIS AND TESTINGSPECIAL TESTING PROCEDURESLINE PRESSURE TEST
2021 Ford Expedition Platinum, RWD
Line Pressure Test
2021 Ford Expedition Platinum, RWDSECTION Line Pressure Test
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
This test verifies the line pressure is within specification.
- If available, refer to the Transmission Line Pressure Test general procedure to access the line pressure tap. REFER to: Transmission Line Pressure Test .
- If equipped, remove the heat shield.
- Remove the 2 bolts. Torque: 10 Nm (88 lb-in)
- Remove the push pin and the heat shield.
- Connect the transmission fluid pressure gauge (307-004) to the line pressure tap using an M10 X 1.00 fitting.NOTE: The line pressure tap is an M10 X 1.00 thread. Do not us a National Pipe Thread (NPT) fitting when installing a pressure gauge. If a NPT fitting is used, damage to the transmission case will occur.
RENDER: 1.0x
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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.