Like my car vibrates after 120km/hr. That really shouldn’t be happening. Let alone from a hit Catalytic converter.
In: 2
It probably isn’t the catalytic converter.
Check the tires (simple things first – pressure correct, not worn down excessively on one side etc)
Next get the wheels balanced and aligned. They should check the joints too.
Next culprit is the brakes and suspension. Things broken or worn shocks etc.
Next probably would be engine mounts. (they get hard or wear out)
Next would be to check the drivetrain – differentials, driveshafts etc
So the first stop would be a tire shop and if that doesn’t work a mechanic.
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