Constant Noise
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
| Cause | Correction |
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| Preliminary Procedure Inspect for the proper gear oil levels prior to performing system diagnosis. Rear Axle Lubricant Level Inspection (LSY) , or Rear Axle Lubricant Level Inspection (L3B) , or Rear Axle Lubricant Level Inspection (LF4) DEFINITION: A noise heard in the rear axle during all driving conditions. This noise may increase or decrease in volume based on different driving maneuvers and speeds. |
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| Low gear oil levels | Faulty oil seals or other type leaks may contribute to lower than required fluid levels. Rear Axle Lubricant Leak Diagnosis Fill to the proper level with the correct gear oil and friction modifier additive. Adhesives, Fluids, Lubricants, and Sealers , or Rear Axle Lubricant Level Inspection (LSY) , or Rear Axle Lubricant Level Inspection (L3B) , or Rear Axle Lubricant Level Inspection (LF4) |
| Worn, loose, or damaged axle mount and/or bracket | Repair or replace the axle mount and/or bracket as required. |
| Bearing noise within the differential assembly | 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 differential assembly | A whine type noise will increase or decrease relative to the vehicle speed, approximately 80 - 96 km/h (50 - 60 mph). Typical causes of a gear set whine type noise may include incorrect backlash and/or pinion depth adjustment or worn or scored gear set teeth.
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