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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 239 (Automatic Transaxle - 4T65-E - Service, Diagnosis & Troubleshooting) >> Diagnostic Information & Procedures >> Road Test Procedure >> Coasting Downshifts

Coasting Downshifts

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. 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 FOURTH gear with the TCC applied.
  3. Release the throttle and lightly apply the brakes.
  4. Verify the following:
    • The TCC releases
    • Downshifts occur at speeds shown in the Shift Speed table. Refer to Shift Speed .
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