My truck is a manual and I've had it for 13 years and am really tired of shifting. I want to do an auto conversion in mine with a BTS and be done with it. A manual can be nice when towing at times but daily city driving sucks.
See there... explain that part in bold.
If you're talking about the ability to manually select your gear, then thanks for providing an example of exactly what I was talking about.
As for any kind of inherent ability when towing, I've melted 2 or 3 of them down now, and my 4R100 has never even tried to get hot while taking hundreds more horsepower continuously. I once put over 15 GALLONS of water through the engine while towing for ~2.5hrs (via the water injection system) at a pretty much continuous 40lbs of boost with over 20 bales behind the truck at 75mph and the trans fluid looked great afterward. On multiple trips with the same load at a max of 27 or so lbs of boost with the ZF6 I have turned that same trans fluid BLACK, and in a few such runs the trans would eventually start popping out of 4th and/or 5th under power.
So for me personally, I'm not seeing any major advantage for towing in terms of the structure of the trans, or its ability to handle continuous power. The ZF6 is of no use other than for a truck that it's already in, and it's cheaper to just leave the pos in place and baby it around.