2011 WRX is making a light thud noise when I put it into 1st and accelerate to about 5 mph.
The noise happens in the first shift to 1st after a startup (not from red lights) and it occurs at about 2-5 mph. I am not hearing this thud noise in any other gear or at any other time. Does not seem to matter whether or not I use reverse before using first. Kinda sounds like running over a plastic cup, but unfortunately its happening every single time.