Test Procedure

Drain transaxle fluid and remove oil pan. Remove valve body cover, oil pump and valve body assembly. See OIL PUMP & VALVE ASSEMBLY under ON-VEHICLE SERVICE. Install Air Pressure Test Plate (T94P-77001-EH) with valve body assembly-to-chain cover gasket.
Faulty clutches and bands may be located by applying 40 psi (276 kPa) air pressure to indicated test ports. See Fig 1 .

Fig 1: Identifying Air Pressure Test Plate Ports
Courtesy of FORD MOTOR CO.
If air pressure fails to operate a clutch, or operates clutches simultaneously, remove and, using air pressure, check fluid passages in the clutches, chain cover, front support and driven sprocket support for obstructions.
If air pressure applied to the accumulator passages fails to operate an accumulator, remove and check fluid passages in the accumulator and chain cover for obstructions.