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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1327 (Automatic Transmission - Mu4 (Introduction, Service & Replacement)) >> Diagnostic Information and Procedures >> Road Test Procedure >> Full Throttle Downshift Test

Full Throttle Downshift Test

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Operate the vehicle at the speeds of 77-88 km/h (48-55 mph).
  2. Verify that the manual selector is in the Drive (D) range and the Overdrive switch is depressed.
  3. Quickly press the accelerator pedal to the Wide Open Throttle (WOT) position.
  4. Verify that the TCC releases.
  5. Verify that the transaxle immediately downshifts to second gear.
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