I think they mean disconnect the driveshaft that connects the transmission to the rear end of the car. If you tow it with the rear on the ground. Or you could just tow it with the rear end up. But I guess what hapens is if the rear wheels are on the ground and the driveshaft is connected the wheels will make the driveshaft and parts inside the transmission turn too fast, unless youre going to drive no more than 30 or 35 mph.

 Im not sure why they dont just town them in 4th gear Im sure someone will explain it better than I can.

 

you only have to drop the drive shaft if you are using a 2-wheel dolly and have an auto trans in the Pinto. If it's a manual trans just put it in neutral. The reason you should pull the drive shaft on an auto if using a 2-wheel dolly is that the trans will heat up as the rear wheels turn and no fluid will be pumping thru to cool it and ruin the auto. You can get away with using a 2-wheel dolly on an auto trans but only if you keep the speed low (under 30mph) and only for a very short distance. While some will say tow it backwards with a 2 wheel dolly and auto trans... that really is not recommended.

As for car trailers... class III hitch required. Without specs on the van (year and motor) hard to say if it will be strong enough. Also depends on the trailer and it's weight... the U-Haul car transports are really heavy and have surge brakes (nice) but again they are pretty heavy. A standard car trailer that most people own are usually much lighter but if they have brakes you usually have to have a brake controller wired up for the brakes to work.