I'm sure tuning has some say in it. And I'm not pulling a 8' wide brick through the wind... Its 40° outside temp
Since I cleaned out the radiator.. Ect is 180-185, oil temps 185-190 (with aux oil cooler) Tranny temps running 115-120° I do have FPE lines and I put thermo sleaves next to the exhaust
I run a few different tunes in the lbz, 70-150 horse. I try very hard not to ever tow at the 150 tune, but it has happened and forced my to 4th gear to keep temps in check, loads are kept light as possible in those few times.
Trans runs 180* while towing heavy in the lbz 200 plus has happened in the hilly stuff and 165ish in the lml when very heavy in the summer 210 has happened