I have a 06 with 1000 miles on it and i was coming back from montana and when I am in 6th gear and put it to the floor and let off really quick it sounds like a grinding/growling noise or something... But when i am going and i ease off the accelarator lightly it doesn't make any noise... The only thing that i could narrow it down too, is maybe its TURBO BARK... . But then again I don't know cause i not familair with what TURBO BARK is... Please Anyone know what this noise is?