Clutch Pressure Test
WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
CLUTCH PRESSURE SPECIFICATION
| Transmission Pressures with TP at 1.5 Volts and Vehicle Speed Above 8 Km/h (5 MPH) | |||||||
|---|---|---|---|---|---|---|---|
| Gear | EPC Tap(1) | Line Pressure Tap | Forward Clutch Tap | Intermediate Clutch Tap | Direct Clutch Tap | ||
| M1 | 124-241 kPa (18-35 psi) | 517-655 kPa (75-95 psi) | 413-586 kPa (60-85 psi) | 0-34 kPa (0-5 psi) | 0-34 kPa (0-5 psi) | ||
| M2 | 276-345 kPa (40-50 psi) | 689-814 kPa (100-118 psi) | 620-715 kPa (90-108 psi) | 648-780 kPa (94-113 psi) | 0-34 kPa (0-5 psi) | ||
| 1 | 124-241 kPa (18-35 psi) | 496-607 kPa (72-88 psi) | 413-607 kPa (60-88 psi) | 0-34 kPa (0-5 psi) | 0-34 kPa (0-5 psi) | ||
| 2 | 276-345 kPa (40-50 psi) | 662-772 kPa (96-112 psi) | 662-772 kPa (96-112 psi) | 662-772 kPa (96-112 psi) | 0-34 kPa (0-5 psi) | ||
| 3 | 276-345 kPa (40-50 psi) | 717-772 kPa (104-112 psi) | 717-772 kPa (104-112 psi) | 717-780 kPa (104-113 psi) | 717-772 kPa (104-112 psi) | ||
| 4 | 241-310 kPa (35-45 psi) | 607-717 kPa (88-104 psi) | 0-34 kPa (0-5 psi) | 607-717 kPa (88-104 psi) | 607-717 kPa (88-104 psi) | ||
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The Clutch Pressure Test will diagnose a low-pressure condition or leakage in a clutch circuit. A difference of 103 kPa (15 psi) or more between the clutch pressure and line pressure will prevent a normal shift.
- Attach 0-2068 kPa (0-300 psi) pressure gauges to the line pressure tap and the appropriate clutch pressure tap according to Band/Clutch Application Chart. Gauges must be accurate enough to distinguish a 103 kPa (15 psi) difference. (If this test is done in conjunction with a control pressure test, pressure gauges will be attached to all pressure taps.) Have sufficient flexible hose available to read the gauges in the vehicle.
- Drive the vehicle. When pressure is applied to the clutch, note the difference between the line pressure gauge and the corresponding clutch pressure gauge.
- If the difference in pressures is less than 103 kPa (15 psi), the corresponding clutch circuit does not have a pressure loss. The gauges on the line pressure tap and appropriate clutch pressure tap can be switched to confirm that gauge calibration differences are not the cause.
- If the difference is greater than 103 kPa (15 psi), there is a leak in the corresponding clutch pressure circuit. The gauges on the line pressure tap and clutch pressure tap can be switched to confirm that gauge calibration differences are not the cause. Carry out the appropriate procedure to correct the clutch leak problem.
WARNING:
If equipped with fire suppression system, refer to FIRE SUPPRESSION SYSTEM
for Important Safety Warnings.
CAUTION:
Pressure gauges affect the shift quality of the transmission. Care must be taken not to accelerate or decelerate rapidly. Possible transmission failure can result.