Line Pressure Test

This test verifies the line pressure is within specification. 

1. If available, refer to the Transmission Line Pressure Test general procedure to access the line pressure tap. REFER to: Transmission Line Pressure Test .
2. If equipped, remove the heat shield.
   1. Remove the 2 bolts. Torque: 10 Nm (88 lb-in)
   2. Remove the push pin and the heat shield.

   Courtesy of FORD MOTOR COMPANY

3. 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.
   NOTE: 10R80 shown, 10R60 similar

   Courtesy of FORD MOTOR COMPANY

4. Start the engine and check the line pressure.
5. Using a diagnostic scan tool, monitor and compare the PID LINEDSD# to actual measured pressure. Actual measured pressure should be within 10 PSI (69 kPa) of PID LINEDSD#. Raise engine RPM to 2000 RPM and verify LPC operation by monitoring LINE pressure while commanding LINEDSD# up and down.
6. If the line pressure is not within specification, see the Line Pressure Diagnosis Chart for possible sources.
7. When the pressure tests are complete, install the line pressure tap plug.
   • Tighten to 11 Nm (97 lb-in).

Line Pressure Diagnosis Chart 

A no-drive condition can exist even with correct transmission fluid pressure because of inoperative clutches. Refer to the Clutch Application Chart to determine which clutch is applied in each gear range. A clutch concern can be further diagnosed by performing the air pressure test.