Are your wind deflectors still there on all the weep hole slots on the outside bottom frame of the window?
You can try putting tape over the weep slots that are missing deflectors next time you drive if covering the weep hole slots reduces the wind noise you will have found the trouble. You should remove the tape after driving so water in the window track can drain out and not get into coach.
Winnebago Parts Direct 641-585-6395 can sell you deflectors if you are missing some.
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Randy - Manhattan, Kansas
2015 Vista 27N
2020 Ford Escape Hybrid
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