Noisy When Coasting

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
Worn wheel drive shaft constant velocity joints	Replace the wheel drive shafts as required. Front Wheel Drive Half Shaft Replacement - Left Side , or Front Wheel Drive Half Shaft Replacement - Right Side
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 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. 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)