Been there done that, will think twice before I try that again... I pulled a 4000lb car on a tow bar back from Worchester Ma. to Toronto (500mi) between 45 and 55mph all the way with a 2400lb Pontiac 4cyl 2L engine, What a ride and through the mountains of Ma. and New York. But you should have seen the looks i got at the toll booths and when I got to Canada Customs and they tried to get the car behind me to back up...as it was a little too close behind..