Test Procedures

A no-drive condition can exist even with correct transmission fluid pressure, because of inoperative clutches or bands. The inoperative units can be located by substituting air pressure for fluid pressure to determine location of malfunction.
Remove main control (valve body) assembly from transmission. See ON-VEHICLE SERVICE . Using attaching screws, install Transmission Test Plate (T92P-7006-A) and gasket. Tighten bolts to 89-106 INCH lbs. (10-12 N.m)
With a rubber-tipped air nozzle, apply air pressure into the appropriate locations specified in the following tests. See Fig 1 . If servo or accumulator does not move when air is applied, clean and inspect to locate cause. If during test, 2 clutches apply or clutch fails to operate, check fluid passages in case and front pump for blockage or damage.

NOTE: Air pressure should be regulated to 40 psi (2.8 km/cm² ) maximum. Compressed air used for test should be filtered and dry to avoid contaminating transmission fluid.

Fig 1: Identifying Air Pressure Test Ports On Adapter Plate

Courtesy of FORD MOTOR CO.