New noise problem

[supeg]

Hey guys, have noticed this for a while but it keeps getting worse and worse.

Its a noise almost like Marbles in a can or something loose banging, it is pretty loud and can be heard in cab and without engine hood open.

It only happens at idle in gear (D,R,1,2) In N or P the noise is not there. Also I can get rid of it by reving above 1k RPM.

I lifted my hood while having it in D and my brother said it sounded like it was coming from the blower.

Does anyone know what this could be? Does it sound like a tranmission issue? It shifts fine and drives fine but when I am at lights and stuff it is very loud and annoying.

 

[sik2000]

You may wanna check your lower #6 see if any bolts are loose. Mine did the same thing and the pulley was loose.

 

[MaLLo_SVT_150]

check pullies asap..my buddies L was having banging noise under the hood and that was what it was..would have been a very bad day if the nut came loose

 

[Scuba-Matt]

Its more than likely the spider coupler in the Supercharger that needs to be changed.
Not to hard to change.