evanrem - maybe take a peek at the wheel alignment of your new trailer? I brought home a new cargo trailer one time... it dog tracked so that you could just see the rivets on one side... the tail end would kind of "cover" the shoulder line... let go of the wheel and it would steer a 1 ton off the right side of the lane in about 1/8 mile...you could feel sharpness on one side of the tire tread running your hand across them - scuffage was starting ...had alignment done right away and you could cruise along hands off the wheel...