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Manual Downshifts

WARNING: This page is about a different car, the 2005 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

The shift solenoid valves control the initial downshift for the 5-4, 4-3, 3-2 manual downshifts. The solenoid states should change during or shortly after a manual downshift is selected.

Manual 5-4 Downshift

  1. Place the gear selector in the OVERDRIVE position.
  2. Accelerate the vehicle to 64-88 km/h (40-55 mph) in FIFTH gear.
  3. Release the throttle while moving the gear selector to FOURTH.
  4. Verify the following:
    • The TCC releases
    • The transmission downshifts immediately to FOURTH gear
    • The engine slows the vehicle

Manual 5-3 Downshift

  1. Place the gear selector in the OVERDRIVE position.
  2. Accelerate the vehicle to 64-72 km/h (40-45 mph).
  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.

Manual 5-2 Downshift

  1. Place the gear selector in the OVERDRIVE position.
  2. Accelerate the vehicle to 48 km/h (30 mph).
  3. Release the throttle while moving the gear selector to SECOND.
  4. Verify the following:
    • The TCC releases.
    • The transmission downshifts immediately to SECOND gear.
    • The engine slows the vehicle.
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