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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1149 (Automatic Transaxle, 4T65-E Diagnostics (Troubleshooting)) >> Troubleshooting >> Whine/Growl Noise That Changes with Vehicle Speed

Whine/Growl Noise That Changes with Vehicle Speed

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Whine/Growl Noise That Changes with Vehicle Speed

Checks Action
DEFINITION: A whine or growl that increases and fades with vehicle speed and is most noticeable under light acceleration
Drive Link Assembly System Verify that the noise comes from the sprockets or the from the drive link assembly chain by placing your left foot on the brake and by moving the gear selector from Park or Reverse. If the noise stops, check the following items.
Drive Sprocket Support (522) and Driven Sprocket Support (609) The bearing outer race support is rough or nicked.
Drive Sprocket (516) and Driven Sprocket (506)
  • Broken or sheared teeth
  • Nicked or scored bearing surfaces
  • The bearing race or roller bearing surfaces on the gear support inner bearing are rough or pitted
  • A damaged bearing
Drive Chain (507) Stretched
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