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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Service, Diagnosis & Troubleshooting) >> Road Test >> Full Throttle Detent Downshift

Full Throttle Detent Downshift

WARNING: This page is about a different car, the 2007 Hummer H2. 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 speeds of 64-88 km/h (40-55 mph) in FOURTH gear.
  3. Quickly increase throttle angle to 100 percent (WOT).
  4. Verify the following:
    • The TCC releases.
    • The transmission downshifts immediately to SECOND gear.
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