Line Pressure Test
| Item | Service Part Number | Description |
|---|---|---|
| 1 | 7A010 | Line pressure tap |
| 2 | 7A010 | Transmission fluid drain plug |
NOTE:
Carry out the LINE PRESSURE TEST prior to carrying out the Stall Speed Test. If the line pressure is low at stall, do not carry out the STALL SPEED TEST or further transmission damage will occur. Do not maintain WOT in any transmission range for more than 5 seconds.
NOTE:
Do not mistake the transmission fluid drain plug for the line pressure tap plug or the transmission fluid will have to be refilled.
This test verifies that the line pressure is within specification.
- Connect the transmission fluid pressure gauge to the line pressure tap.
- Start the engine and check the line pressure. Refer to the Line Pressure Chart to determine if the line pressure is within specification.PRESSURE CHART
Gear Line Pressure at Idle KPa (psi) Line Pressure at WOT Stall KPa (psi) Minimum Maximum Minimum Maximum P 344.7 kPa (50 psi) 448.2 kPa (65 psi) - - R 551.6 kPa (80 psi) 689.5 kPa (100 psi) 1, 689.2 kPa (245 psi) 2, 068.4 kPa (300 psi) N 344.7 kPa (50 psi) 448.2 kPa (65 psi) - - D 482.6 kPa (70 psi) 620.5 kPa (90 psi) 1, 689.2 kPa (245 psi) 2, 068.4 kPa (300 psi) - If the line pressure is not within specification, see the Line Pressure Diagnosis Chart for line pressure concerns.
- When the pressure tests are completed, install the line pressure tap plug.
- Tighten to 9 Nm (80 lb-in).LINE PRESSURE DIAGNOSIS CHART
Test Results Possible Source HIGH at IDLE - ALL RANGES Wiring Harnesses, LPC Solenoid, Main Regulator Valve LOW at IDLE - ALL RANGES Low Fluid Level, Fluid Inlet Filter/Seal, Main Control Body, Cross Leaks, Gaskets, Pump, Separator Plate LOW in Park ONLY Valve Body LOW in Reverse ONLY Separator Plate, Reverse Clutch, Valve Body, Forward Clutch LOW in Neutral ONLY Valve Body LOW in Drive with O/D ONLY Forward Clutch, Valve Body LOW in Manual Low ONLY Forward Clutch, Valve Body
- Tighten to 9 Nm (80 lb-in).