LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2008 >> Expedition EL RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 81 (Automatic Transaxle/Transmission - 6HP26) >> Diagnostic Tests >> Torque Converter Diagnosis >> Torque Converter Operation Test

Torque Converter Operation Test

WARNING: This page is about a different car, the 2008 Lincoln Navigator L and 2008 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

This test verifies that the torque converter clutch control system and the torque converter are operating correctly.

  1. Carry out Quick Test with scan tool. Refer to the Introduction - Gasoline Engines article. Check for DTCs.
  2. Connect a tachometer to the engine.
  3. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in DRIVE position.
  4. After normal operating temperature is reached, maintain a constant speed of about 80 km/h (50 mph) and tap the brake pedal with the left foot.
  5. Engine RPM should increase when the brake pedal is tapped and decrease about 5 seconds after the pedal is released. If this does not occur, see Torque Converter Operation Concerns. Refer to Diagnosis By Symptom .
  6. If the vehicle stalls in DRIVE or at idle with the vehicle at a stop, move the transmission range selector lever to the manual 1 position. If the vehicle stalls, see Torque Converter Operation Concerns. Refer to Diagnosis By Symptom . If the vehicle does not stall in DRIVE, refer to Diagnosis By Symptom .
NOTE: The following is a list of common vehicle concerns that have been misdiagnosed as torque converter clutch shudder. For diagnosis of the following items, refer to the appropriate parts of the workshop manual and the Introduction - Gasoline Engines article.
scientia non olet · About LEMON Manuals