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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 528 (Automatic Transmission Service, Removal & Installation - 4L60-E) >> Diagnostic Information and Procedures >> Road Test Procedure >> Part Throttle Detent Downshift

Part Throttle Detent Downshift

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. 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 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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