Intermittent Noise
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
Intermittent Noise
| Cause | Correction |
|---|---|
| Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Lubricant Change . | |
| Loose propeller shaft mounting bolts | Tighten the bolts as required. Refer to Propeller Shaft Replacement in Propeller Shaft. |
| Worn, loose or missing differential mounts | Repair or replace the differential mounts as required. |
| Loose torque tube bracket or a damaged bracket bushing | Tighten the bracket bolts or replace the bracket as required. |
| Incorrect type fluid Installation of the incorrect type gear oil may create a "moan" type noise within 7 770-25 900 km (3-10,000 miles). Fluid that is "black" in color is to be considered normal and is darkened by the carbon material in the clutch plates. |
Replace the rear differential assembly as required. Fluid replacement will not correct a "moan" condition caused by the use of incorrect oil. Refer to Differential Replacement . |