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Home >> Chevrolet >> 2009 >> HHR LS, Automatic >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4T45-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Diagnostic Information And Procedures >> Road Test >> Part Throttle Detent Downshift

Part Throttle Detent Downshift

  1. Place the gear selector in the OVERDRIVE position.
  2. Accelerate the vehicle to 64-88 km/h (40-55 mph) in FOURTH gear.
  3. Quickly increase throttle angle to greater than 50 percent.
  4. Verify the following:
    • The TCC releases
    • The transmission downshifts immediately to THIRD gear
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