I would honestly get a auxillery cooler for the transmission before you start towing.. Wouldnt tow without one..
The Inline 6 isnt a quick engine, but its reliable and torqy 225-230 ft lbs of low rpm torque. The nickname for the engine is 4.slow instead of 4.0. When towing you dont have to keep up with traffic, it isnt a race. Never go over 55mph towing anyway, and turn overdrive off.
2013 6.2 V8 Camaro SS 3,000 miles :-)
1998 5.9 V8 Limited Platinum ZJ 144,xxx miles
1998 4.0 I6 Laredo ZJ 203,xxx miles Yay !