hello just bought a 04 GTO auto 38,000 miles. OK took it to Vector Motorsports for a tune and trans shift firmness. Someone was in the programming before but only changed the tranny shift times and had it to low. But now It shifts fast and breaks loose the tires between 1st and 2nd but i get a noise sometimes when it shifts from 2nd to 3rd. Hard to describe the noise. Not a cluck or bang but a Scratch noise????? don't know if i should do something or not?/ please help anyone.