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Home >> GMC >> 2002 >> Envoy 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 63 (Automatic Transmission Diagnosis - 4L80-E (Gasoline)) >> Performance Tests >> Road Test >> Part Throttle Detent Downshift

Part Throttle Detent Downshift

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. Place the gear shift lever in the Overdrive position.
  2. Accelerate the vehicle to 40-55 MPH in 4th gear.
  3. Quickly increase throttle angle to greater than 50 percent.
  4. Verify the TCC releases and transmission downshifts immediately to 3rd gear.
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