Torque Converter Stall Speed Test
CAUTION:
DO NOT
perform torque converter stall speed test for more than 10 seconds or transaxle may be damaged. DO NOT
move shift lever while increasing engine speed.
- Apply parking brake and block all wheels. Connect tachometer. Start engine. Ensure A/C is off. Warm engine to normal operating temperature. Place shift lever in "2" position.
- Fully depress brake pedal. Fully depress accelerator for 6-8 seconds and note engine speed. This is torque converter stall speed.
- Allow transaxle to cool for 2 minutes. Repeat test procedure with shift lever in "D4", "1" and "R" positions.
- Torque converter stall speed should be the same in "D4", "2", "1" and "R" positions and should be within specification. Refer to the TORQUE CONVERTER STALL SPEED SPECIFICATIONS table below. If the torque converter stall speed is not within specification, refer to the TORQUE CONVERTER STALL SPEED TROUBLE SHOOTING table for possible problem areas.
TORQUE CONVERTER STALL SPEED SPECIFICATIONS
| Application | Engine RPM |
|---|---|
| Standard | 2400 |
| Service Limit | 2200-2600 |
TORQUE CONVERTER STALL SPEED TROUBLE SHOOTING
| Torque Converter Stall Speed Test Results | Probable Cause |
|---|---|
| Stall Speed RPM High In "D4", "2", "1" & "R" | Low Fluid Level, Low Oil Pump Output, Clogged Fluid Strainer, Pressure Regulator Valve Stuck Closed, Slipping Clutch |
| Stall Speed RPM High In "R" | Slipping 4th Clutch |
| Stall Speed RPM High In "D4" | Slipping 1st Clutch, Defective One-Way Clutch |
| Stall Speed RPM High In "2" | Slipping 2nd Clutch |
| Stall Speed RPM High In "1" | Slipping 1st-Hold Or 1st Clutch, Defective One-Way Clutch |
| Stall Speed RPM Low In "D4", "2", "1" & "R" | Engine Output Low, Torque Converter One-Way Clutch Slipping |