I just purchased a 1991 318is. Now I have to go and get it. I don't want to take my 3500 lb. enclosed trailer to transport it, so I've rented a tow dolly to make the 700 mile round trip. Gas savings alone will pay for the rental. My question is this: Will i do any harm to the car by towing it without disconnecting the driveshaft or rear axels? I could drop the driveshaft if needed, but I really don't want to lay on a Detroit city street working on a car.