I have the exact coach and we get an annoying noise above 50 mph. This is a design problem and the grill is the culprit. Tiffin is aware of the problem and supposedly designed a fix with a replacement grill. Others have requested this grill (I have not) but complain that it's still making noise. I am experimenting with quieting mine, but the noise persists.
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Lou & Mary Jo + Scooter & Sophie
2008 Allegro Bay 35TSB W-25.5
2005 Jeep Liberty Toad
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