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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Automatic Transaxle - 4T65-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Diagnostic Information And Procedures >> Road Test >> Full Throttle Detent Downshift

Full Throttle Detent Downshift

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 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 speeds of 64-88 km/h (40-55 mph) in FOURTH gear.
  3. Quickly increase throttle angle to 100 percent (WOT).
  4. Verify the following:
    • The TCC releases
    • The transmission downshifts immediately to SECOND gear
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