Does a 1970s SEL automatic trans car need to have the drive line disconnected when being towed a long distance (30 miles)? The old GM Power Glides had a rear output shaft pump that circulated the oil for cooling and could be towed without disconnecting the drive shaft. The reason I am asking is that a guy delivered a parts car to me that was towed by the front but the trans is still working and it shows no signs of being overheated. It was low by 2 quarts on trans oil but it looks like the leak is coming from gaskets rather than seals. Does anyone have any special knowledge about this subject?