6.0L underhood squeal during hard shift!

[C3Sierra]

I have noticed a squeal under the hood when shifting from 1st to 2nd at WOT. It really sounds like a belt squealing. I asked my dealer about it and they say it is the new clutch on the fan and that they have tried to replace them but it does no good. Has anybody else had this problem

[mikeb]

Gotta feed that squrirrel once in a while,  LOL.

 

Seriously though, I've been reading a lot of forums lately and haven't seen this problem, but maybe one of the other guys will know.