I tow my 1968
Globe Trotter with a 2007 3.3, short wheelbase Dodge Caravan.
The weakest link in the system is the 41TE, transmission. All else is well. Love the van. Works great, not scary.
I installed an auxiliary trans oil cooler and a temperature gauge for the transmission.
Chrysler recommends towing in “3” instead of “D”.
Over the Cumberland pass, just to ease the load on the trans, I dropped down to 40mph and used “L”.
With caution, on the flats across Ohio I could hit 80mph in “D”.
Most of the time, I'm in “3” like Chrysler says, and going 65mph, but the gas mileage drops to 11.
The 3.3 engine doesn't care, and runs fine.
When able, I loaf down the hills in “D” and pick up some speed.
OEM shocks are marginal, so I installed coil-over Monroes on the back. I have a class three hitch, rear axle anti-sway bar, and first oversize Michelin LTX M+S on all corners. Tekonsha P2 brake controller.
Not a fan of airbags. You may not need them with a Weight Distribution Hitch.
I use the somewhat unique Reese 350 Mini-Lite WD hitch, which performs well. The Rig is very steady. Your van is longer and has more rear overhang, so you might want to use a “Grown-up” WD Hitch.
Minivans in general have comparatively weak transmissions. I've studied the 41TE transmission quite a bit. The latest/last generation is the best version. It works well unless it has to frequently shift from fluid drive to “lock-up”. This mostly only occurs at highway speeds in “D”, but can occur in “3”. I can't hear or feel or see on tachometer the moment that this occurs, as it is only a 200rpm engine change.
Ideally, I will someday discover an electronic method to over-ride the transmission computer which is overly complicated ( it studies your driving style and adjusts itself … No Thanks). There are Dealer and aftermarket trans computer “flashes” available, but they don't solve the problem. If you search a lot, there's a guy who does something with a couple of Radio Shack switches spliced in, but I'm skeptical.
Anyway, there's lots to figure out about setting up this marginal trans for towing.
Meanwhile, Heavy Service fluid and filter change schedule, Baby it along, and never overheat it. Use Chrysler ATF+4 and Mopar filter. No "fancy" ATF needed.