Exterior Chimney Chase Noisy in Wind

[wallpaper79]

Anyone here have a exterior chimney chase that was noisy. I have an A frame house. The class A chimney runs up the from of the house about 8 feet to the left of the peak. I chased the class A just for looks. Problem is we live in an area that gets alot of wind, and the bloody thing is always roaring. Any suggestions would be greatly appreciated. Taking it off is not an option...I covered it in faux stone which wasn't overly cheap.

Thanks

 

[webby3650]

What is making the noise? Is the noise heard in the flue or is something on the chase making noise? Could be a loose chase cover, or wind screaming through the cap? Is the flue secured to the chase cover? It could be wobbling in the hole if it's not secured.