Pressure Test: Notes

Fig 1: Locating Pressure Tap

Courtesy of FORD MOTOR CO.

CAUTION: If the pressure is low at stall, do not continue with the test or further transaxle damage will occur. Do not maintain wide open throttle in any transaxle range for more than 5 seconds.

NOTE: In order to connect the pressure gauge to the transaxle, you will need to use an O-ring to pipe adapter (5/16-24 to 1/8 inch pipe thread adapter).

This test verifies that the pressure is within specification.

Connect a pressure gauge to the appropriate pressure tap.

Start the engine and check the pressures, see the Pressure Charts to determine if the pressures are within specification.

CLUTCH AND BRAKE PRESSURE CHART

Clutch	Range	Pressure
C1	Drive (1st-4th)	196-1,372 kPa (28-199 psi)
C2	Drive (4th-6th)	196-1,372 kPa (28-199 psi)
C3	Drive (3rd, 5th)	196-1,372 kPa (28-199 psi)
C3	Reverse	392-1,863 kPa (57-270 psi)
B2	Low manual (1st)	588-1,372 kPa (85-199 psi)
B2	Reverse	392-1863 kPa (57-270 psi)

PRESSURE DIAGNOSTIC CHART

Test Results	Possible Source
Values of both D and R ranges are lower than the standards	Pressure control solenoid A (PCA) Primary regulator valve failure Oil pump failure Leak from hydraulic circuit of D or R range
Only the value of D range is lower than the standards	D range hydraulic circuit failure C1 clutch failure
Only the value of R range is lower than the standards	R range hydraulic circuit failure C3 clutch failure B2 brake failure

If the pressure is not within specification, install a new main control valve body.
If the pressures are OK, clear all DTC. Test drive vehicle, code could be intermittent. If DTC code returns, install a new valve body.