So my car makes a pretty intense rattling noise above 45 mph or so regardless of gear it's in. It is only present under any acceleration, coasting in gear is fine. It sounds like it's coming from the front of the transmission, almost like somewhere behind and below the radio panel. Any idea what'd it be? I don't think it's knock because it's only present above that speed but I could be wrong. Timing is at 12 degrees on 93 octane.