GM Service Manual Online
For 1990-2009 cars only

Cause

Correction

DEFINITION: Inspect for proper gear oil levels prior to performing system diagnosis.

Loose propeller shaft mounting bolts

Tighten the bolts as required

Worn propeller shaft constant velocity joint

    â€¢ Replace the propeller shaft assembly.
    â€¢ A worn propeller shaft constant velocity joint may create a clicking, grinding, or snapping type noise.

Worn axle shaft constant velocity joints

    â€¢ Replace/repair the axle shaft as required.
    â€¢  A worn axle shaft constant velocity joint may create a clicking, grinding, or snapping type of noise.

Worn or damaged differential housing support bushings side

    â€¢ Replace the bushings as required.
    â€¢ A worn bushing may create a clunk type of noise during acceleration or deceleration.

Worn or damaged differential housing support bushings rear

    â€¢ Replace the bushings as required.
    â€¢ A worn bushing may create a clunk type of noise during acceleration or deceleration.
    â€¢ Check the bushing orientation, the tuning slots must be in proper position.

Loose rear mounting bracket bolts

Tighten the bracket bolts as required.

Loose or damaged prop guard

    â€¢ Repair or replace as required.
    â€¢ A loose dust shield may contact the propeller shaft assembly and create a scraping or grinding type of noise.

Gear set whine noise within clutch coupling assembly

    â€¢ A whine type of noise will increase or decrease relative to the vehicle speed approximately 80-90 km/h (50-56 mph).
    â€¢ Check for the proper fluid level
    â€¢ Repair or replace the unit as required.

Shutter or moan at slow speeds or slow time

  1. A shutter or moan type of noise in slow sharp turns.
  2. The RDM could be contaminated with the wrong fluid type/water.
  3. Replace the fluid; fill as required and retest under conditions.