To the original post, modern auto's are best suited to towing, probably more suitable than manuals because the modern torque convertor is much more efficient at using the engine torque than a manual because first it is a torque multiplyer (Google it) and second it allows some slippage to cater to varying demands from the load. Manuals as previously noted, are detuned somewhat to save clutch wear and ultimately slipping. Used correctly, auto's are superior to manuals for towing. (Not just because I own one
) I'm not a fan of torque converter lockup because it defeats the advantage of the torque convertor efficiency. That's why I suggested lower gears and never overdrive (6th in 6speed and 4th in 4speed)
TC lockup is fine on the road without a load but load it up and you need slippage and the multiplyer effect. Here's how TC works;
https://www.motortrend.com/how-to/0808r ... onverters/Just to demonstrate, most heavy vehicles, busses, semi-trailers, tractors, mine trucks etc. etc. are automatic transmission so there's the proof of the pudding
I'm sure those 200tonne mine trucks are automatic transmission.
Also, even back in the old days
in the 1970's I worked on Caterpillar D7's and D8's and they had fluid drive automatic transmissions. I think they are designed for heavy loads!
Cheers Gipsy
although I'm sure somebody will challenge that
even Einstein wasn't certain of his theories.
My 2013 auto D4D DC SR5, prefilter, 3" exhaust and Chip with egt probe, stock SR5 rims with Toyo Open Country AT2 265/65R/17's