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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 159 (Automatic Transaxle - 4T65-E - Service, Diagnosis & Troubleshooting) >> Troubleshooting >> Road Test Procedure >> Manual Downshifts >> Manual 4-3 Downshift

Manual 4-3 Downshift

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Place the gear selector in the OVERDRIVE position.
  2. Accelerate the vehicle to 64-88 km/h (40-55 mph) in FOURTH gear.
  3. Release the throttle while moving the gear selector to THIRD.
  4. Verify the following:
    • The TCC releases
    • The transmission downshifts immediately to THIRD gear
    • The engine slows the vehicle
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