Yes, probably the most common noise, but a klunk is not a groan. And the track rod mounts can not be heard with the car motionless. They also can not be diagnosed by observation except to condemn all that have broken boots.

The noise they make is due to movement in the longitudinal direcetion.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician