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
Preliminary Procedure Inspect for the proper gear oil levels prior to performing system diagnosis. Front Axle Lubricant Level Inspection
Low gear oil levels	Faulty oil seals or other type leaks may contribute to lower than required fluid levels. Front Axle Lubricant Leak Diagnosis Fill to the proper level with the correct gear oil. Adhesives, Fluids, Lubricants, and Sealers , and Front Axle Lubricant Level Inspection
Bearing noise within the differential assembly	A grinding or roar type noise will increase or decrease relative to the vehicle speed. Check for the proper fluid level. Fill as required. If the noise continues, replace the carrier unit. Front Differential Carrier Assembly Replacement (LSY) , or Front Differential Carrier Assembly Replacement (L3B) .
Gear set whine noise within the differential assembly	A whine type noise will increase or decrease relative to the vehicle speed, approximately 31 - 37 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. Check for the proper fluid level. Fill as required. Replace the carrier unit. Front Differential Carrier Assembly Replacement (LSY) , or Front Differential Carrier Assembly Replacement (L3B)