Air Pressure Test: Notes
A NO DRIVE condition may exist even when line pressure is correct. This may be caused by an inoperative band or clutch. An erratic shift may be located by substituting air pressure for fluid pressure.
With gear selector lever in a forward gear position, a NO DRIVE condition may be caused by an inoperative forward clutch, low-intermediate one-way clutch or low-intermediate band.
A NO COAST condition in manual low (1st gear), could be caused by a faulty direct clutch or direct one-way clutch. Reverse failure may be caused by a malfunctioning reverse clutch, forward clutch or low-intermediate one-way clutch. Use the following procedure to perform air pressure tests:
- Drain transaxle fluid and remove oil pan. Remove side cover, oil pump and valve body assembly. See OIL PUMP & VALVE ASSEMBLY under ON-VEHICLE SERVICE. Install Air Pressure Test Plate (T91P-7006-A) with valve body assembly-to-chain cover gasket.
- Faulty clutches and bands may be located by applying air pressure to the indicated test ports. See Fig 1 . Refer to appropriate test procedure for listed components.