hello everybody..if i dont drive my car for about a day and i pull out slowly reversing, i get a grinding sound form either my engine, tranny, and or custom catback that i have on)? i only hear it going to from either 1st gear or reverse..anyone have a clue? im kinda leanin toward my custom catback cuz it feels like its comin from under the car or the engine toward the header stock)..oh and i have a aem cai so i dunno if that could affect it or not. anybody?
