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Home >> Pontiac >> 2009 >> Solstice Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 5L40-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Diagnostic Information And Procedures >> Road Test >> Manual Downshifts

Manual Downshifts

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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