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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 35 (Automatic Transmission - ALLISON - Service, Diagnosis & Troubleshooting) >> Road Test Procedure >> Manual Downshifts

Manual Downshifts

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Manual 5-3 Downshift

  1. Place the shift selector in DRIVE.
  2. Accelerate the vehicle to obtain FIFTH range.
  3. Release the throttle while moving the shift selector to THIRD.
  4. Verify the following conditions:
    • The TCC releases.
    • The transmission downshifts immediately to FOURTH range and then to THIRD range.
    • The engine slows the vehicle.

Manual 5-2 Downshift

  1. Place the shift selector in DRIVE.
  2. Accelerate the vehicle to obtain FIFTH range.
  3. Release the throttle while moving the shift selector to SECOND.
  4. Verify the following conditions:
    • The TCC releases.
    • The transmission downshifts immediately to FOURTH range, then to THIRD, then to SECOND.
    • The engine slows the vehicle.