Irvin Mendez
Member
It definitely sounds like it's external to an assembly. It's possible that the torque converter overheated and ballooned up, forcing the flex plate against the back of the engine and causing the scraping noise. However, when that happens you will typically have associated transmission issues. Might be time to get a diagnosis from the dealer.
Ill be dropping it off at the dealership tomorrow, will advise them of this comment. I dropped it off last week but they were unable to duplicate the sound. Aside from the gas pedal vibration, truck shifts very smoothly.