Knock or Clunk 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
DEFINITION: Knocking or clunking noise occurs when operating the vehicle in high gear or coasting in neutral at 16 km/h (10 mph).
Joint worn or loose/ripped boot	Replace the propeller shaft assembly. Front Axle Propeller Shaft Replacement (L3B) , or Front Axle Propeller Shaft Replacement (LSY) Propeller Shaft Replacement (LSY, RWL) , or Propeller Shaft Replacement (L3B, RWL) , or Propeller Shaft Replacement (L3B, F46) , or Propeller Shaft Replacement (LSY, F46) , or Propeller Shaft Replacement (LF4, MHU) , or Propeller Shaft Replacement (LF4, MG9)
The side gear hub counterbore in the differential is worn oversize.	Replace the differential case and/or the side gears. Front Differential Carrier Assembly Replacement (LSY) , or Front Differential Carrier Assembly Replacement (L3B) Differential Carrier Assembly Replacement (LSY, RWL) , or Differential Carrier Assembly Replacement (L3B, RWL) , or Differential Carrier Assembly Replacement (LSY, F46) , or Differential Carrier Assembly Replacement (L3B, F46) , or Differential Carrier Assembly Replacement (LF4)