Hey ya'll. I'm a still a bit new to the whole car/mustang deal but lately i've been hearing something odd coming from my stang. It's an '03 stang GT dlx auto and i notice when it's running normal temp, going from 2nd to 3rd gear it'll sound like it's losing power from the tranny and give some weird noise almost like thu-thu-thu till it hits 3rd gear and it's back to normal. I'm wondering if anyone can help me out with trying to figure out the problem if it's the transmission or some other problem. Much appreciated!