When this happened to me it turned out to be a bushing that was shot
in the assembly on the drivers side (motor was fine). I suspect it may
have been loosened when the W/W stuck to the windshield a few times
during an ice storm. Once loose, the wear took it's toll.
I ordered a replacement from a junker at Potomac German Auto Parts
near Baltimore, I lubricated it, installed it and It was still fine
when I sold the car four years later.
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