Quote:
Originally Posted by arpad_m
Yup, if it's an automatic, the noise is more than likely to come from the AFM valves. These use the same mechanism as the NPP exhaust valves and can squeak just as much. Although AFM is tu(r)ned off on my car, I regularly lubricate the NPP valves with Drislide and hear no squeaking whatsoever.
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This^^^
I experienced the squeaking noise in my A10 equipped SS 1LE while I was running the fun roads in the Smokey Mountains. I had concluded it was the AFM valves located ahead of the diff on the exhaust. I believe the heavy part throttle use combined with high heat was causing the noise.