Hi,
Teflon bushing(s) in the transmission is cracked or worn out probably.
You have to remove the plastic vent thingy(your description) and take
a look.
Tony
Don Lee wrote:
> Lots of rain last week, after a dry, dry summer. Noticed that the wipers
> became very erratic in where they reversed their stroke. Would start
> working fine, then after a few minutes would start slapping at the bottom of
> the stroke, and the right wiper would sometimes come way over at the top of
> the stroke. Wind at highway speed seemed to move them around a lot.
>
> Motor? Transmission? I'm guessing the guts are under the plastic vent
> thingy at the bottom of the windshield. How tough to get at?
>
>
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