So when I am slowing or coming to a stop, and I let off the gas, and only in 1st gear..i hear somekind of grinding/'machine gun' sounding noise. Kinda like a chain or something gets slack and is dragging on someting. The second I give just a tiny bit of gas it goes away almost like it tensions up until i let off again. It sounds like it is mid center underneath. I cannot figure this out. It has happened in the past but eventually went away..now it has been doing it over a week straight. Any ideas on what pressing the gas pedal could tighten up or take slack from? It also happens in reverse at slow speeds.