Line Pressure Test
- Remove transmission test plugs and connect pressure gauge. See Fig 1. Block all wheels. Apply parking brake. Start engine and shift into "D" range.
- Apply brakes and depress accelerator. Note pressure readings at idle and stall speed. Repeat test in "R" range. Compare pressure readings to those listed in LINE PRESSURE SPECIFICATIONS table. If pressure is lower than specified, check throttle cable adjustment.
- Perform test again after adjustment. High pressure in both ranges indicates that throttle cable may be out of adjustment, defective throttle valve or regulator valve.
- Low pressure in both ranges indicates throttle cable may be out of adjustment, defective oil pump, throttle valve, regulator valve or Overdrive (OD) direct clutch.
- Low pressure in "D" range only indicates "D" range circuit leaking pressure or defective forward clutch. Low pressure in "R" range only indicates "R" range circuit leaking pressure, defective direct clutch, 1st and reverse brake.
LINE PRESSURE SPECIFICATIONS
| Application | psi (kg./cm (2)) | |
|---|---|---|
| "D" Range | ||
| Idle Speed | 67-75 (4.7-5.3) | |
| Stall Speed | 141-178 (9.9-12.5) | |
| "R" Range | ||
| Idle Speed | 95-122 (6.7-8.6) | |
| Stall Speed | 235-269 (16.5-18.9) | |