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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1375 (Rear Drive Axle) >> Diagnostic Information and Procedures >> Noise Diagnosis - Rear Drive Axle >> Engine and Transmission Noise

Engine and Transmission Noise

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.

The engine or transmission may sometimes produce noises which may be mistaken for rear axle noise. To determine which unit is actually causing the noise, run the following tests:

  1. Record the speed, RPM and other conditions at which the noise is most pronounced.
  2. Stop the vehicle in a quiet place to avoid interference with other extraneous noises.
  3. With the transmission in neutral, slowly run the engine speed up and down to the engine speeds that correspond with the vehicle speed at which the noise was most pronounced. If the noise is produced with the vehicle at a standstill, the problem lies in the engine or transmission and not in the rear axle.
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