Torque Converter

WARNING: This page is about a different car, the 2002 Ford Escape, 2001 Mazda Tribute, and 2001 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: After each test, shift transaxle into Neutral and run engine for at least 15 seconds to cool torque converter and transaxle 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/Reverse One-Way Clutch
Reverse Clutch
Forward One-Way Clutch
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 2383-2805 RPM for Cougar and 2586-2963 RPM for Escape and Tribute. If stall speeds exceed specification, ensure engine is mechanically okay and tuned to specification. If engine is okay, remove torque converter one-way clutch and check for slippage.
If stall speed is too high in "D", "2" or "1", the following components may be faulty:
- Forward Clutch
- Forward One-Way Clutch
- Low One-Way Clutch
If stall speed is too high in "R", the following components may be faulty:
- Low/Reverse Clutch
- Reverse Clutch