Stall Speed Test
NOTE:
After each test, shift transaxle into Neutral and run engine for at least 2 minutes to cool torque converter and transmission fluid.
CAUTION:
Do not maintain Wide Open Throttle (WOT) in any gear for more than 5 seconds. If engine RPM exceeds maximum specified stall speed, release accelerator immediately. Clutch or band slippage is indicated.
The stall speed test checks the operation of the following items:
- Converter One-Way Clutch
- Forward Clutch
- Low One-Way Clutch
- Reverse Clutch
- Low-Intermediate Band
- Engine Performance
- Apply service and parking brakes. Connect tachometer to engine, and record RPM reached in each gear selector range (except Neutral) at WOT. Stall speed should be as indicated in STALL SPEED SPECIFICATIONS TABLE.
- If stall speeds exceed specification, ensure engine is mechanically okay and tuned to specification. If engine is okay, remove torque converter and check torque converter one-way clutch for slippage.
- If stall speed is too high in "OD", "D", "1", the following components may be faulty:
- Forward Clutch
- Low-Intermediate One-Way Clutch
- Low-Intermediate Band or Servo
- If stall speed is too high in "R", the following components may be faulty:
- Forward Clutch
- Low-Intermediate One-Way Clutch
- Reverse Clutch
STALL SPEED SPECIFICATIONS
| Application | Stall RPM |
|---|---|
| Sable & Taurus | 1860-2200 |
| Windstar | |
| 3.0L V6 | 1900-2231 |
| 3.8L V6 | 2022-2641 |