Lincoln MKZ whining noise from drivetrain due to failed drive shaft bearing replacement needed on Lincoln MKZ

Some Lincoln MKZ owners report experiencing a whining noise in the drivetrain, which may be RPM dependent and linked to a failed driveshaft bearing. This issue often arises from the AWD rear driveshaft center support bearing failing, leading to potential driveline vibration or howling noises, particularly at highway speeds in cold temperatures. To diagnose the problem, some owners find it helpful to remove the rear driveshaft and conduct a road test to see if the noise disappears. It is crucial for owners to have the driveshaft inspected and replaced if necessary, and to seek professional assistance promptly to prevent further complications and ensure the drivetrain operates smoothly and safely.