Flat towing a Chrysler Town and Country

I think you might find the Van a bit overweight for the capabilities of the gas engine. I say that because years ago I saw a motorhome pulling into a campground in Colorado being followed by their van. Wanting to tow a heavier vehicle I asked how it was going. I was told the MH just had the transmission repaired in Denver and they were going to end up driving separately and not towing the rest of the trip. A dolly with brakes will add at least 500lbs to your total package.

Remcotowing is about the only place that specializes in lube pumps.

A 37' Damen Challenger has a GVWR and GCWR difference of only 4,000 lb.
That is what it can tow. Your Town Car weighs in around 4,600 lb plus what extra is loaded in it.

Best to find a lighter Toad to tow. Or have someone drive and follow the MH in the Town car

Your van is over 5K. I would not want to risk tranny trouble. I would consider a smart car or Nissan Leaf. Just my opinion. Happy Trails