Noisy in Drive
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6 and 2006 Chevrolet Uplander. However, it is still accessible from the selected car via links, so may be relevant.
Noisy in Drive
| Cause | Correction |
|---|---|
| Inspect for the proper transaxle and gear oil levels prior to performing system diagnosis. Refer to Transfer Case Fluid Replacement . | |
| Water or contamination within the transmission oil Water or contamination within the transmission fluid, causing excessive torque converter clutch slip rate, may create a grind, growl or moan in the rear differential or torque tube under light or steady load conditions. |
Replace the transmission fluid and flush the transfer case of the contaminated fluid. Refer to Transfer Case Cleaning (Transmission Fiber Material) in Transfer Case - Steyr Unit Repair. |
| Loose propeller shaft mounting bolts | Tighten the bolts as required. Refer to Propeller Shaft Replacement in Propeller Shaft. |
| Worn propeller shaft constant velocity joints | Replace propeller shaft assembly. Refer to Propeller Shaft Replacement in Propeller Shaft. |
| Worn axle shaft constant velocity joints | Replace the constant velocity joints as required. |
| Loose rear axle torque tube bracket or a worn bracket bushing | Tighten the bracket bolts or replace the bracket as required. |
| Worn bearing in the rear differential torque tube assembly | Replace the torque tube assembly |
| Torque tube dampener loose or missing A moan or exhaust leak type noise at higher engine speeds, approximately 2,000-2,500 RPM, may indicate a loose or missing dampener. |
Tighten the dampener retaining bolt or replace the torque tube assembly as required. |
| Incorrect gear oil in the transfer case | Replace with gear oil GM P/N 12378514 (Canadian P/N 88901045). |
| Bearing noise within the transfer case A grinding or roar type noise will increase or decrease relative to the vehicle speed. |
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| Gear set whine noise within the transfer case Whine type noises will increase or decrease relative to the vehicle speed approximately 80-97 km/h (50-60 mph). |
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