wastegate problems
 

I have a 2011 f350 6.7. My turbo boost is going to 37#'s and higher just driving down the road. It usually runs around 16#'s. And when I turn the engine off it sounds like leading air for a bit.
Some one told me I was having wastegate problems, now the biggest problem all I can find to replace the unit is to buy the whole turbo. I just replaced the turbo last year, and of course the warranty just went out. I can't believe I have to replace the whole unit just for a little vaccuum unit.

Has anyone ele expirenced this problem and where I can I find just the unit withou having to buy a new turbo.

Thanks

Alton