Stall Speed Test: Notes
WARNING:
Block all wheels, set the parking brake and firmly apply the service brake to reduce the risk of vehicle movement during this procedure. Failure to follow these instructions may result in serious personal injury.
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.
The Stall Speed Test checks:
- torque convertor operation and installation.
- holding ability of the forward clutch.
- reverse clutch.
- planetary OWC.
- engine driveability concerns.
Conduct this test with the engine coolant and transmission fluid at correct levels and at normal operating temperature.
Apply the park brake firmly for each Stall Speed Test.
STALL SPEED CHART
| Engine/Transmission | RPM |
|---|---|
| 2.0L GTDI | 2, 775-3, 066 |
- Connect the scan tool.
-
NOTE: If the recorded RPM exceeds the maximum limits, release the accelerator pedal immediately, clutch slippage is indicated.
In each of the following ranges Drive, Low and Reverse, press the accelerator pedal to WOT. Do not hold the throttle open for more than 5 seconds at a time.
- Note the results in each range.
- After each range, move the selector lever to NEUTRAL and run the engine at 1, 000 RPM for about 15 seconds to cool the torque converter before conducting the next test.
- Use the Stall Speed Diagnosis Chart for corrective actions.
-
NOTE: The stall speed in REVERSE will be lower.
If stall speeds were too high, see the STALL SPEED DIAGNOSIS CHART. If stall speeds were too low, first check engine idle speed and tune up. If engine is OK, remove torque converter and check TCC for slippage.
STALL SPEED DIAGNOSIS CHART
| Range | Possible Source |
|---|---|
| D, L | Forward Clutch Low/Reverse Clutch Low/OWC |
| R | Low/Reverse Clutch Direct Clutch |