They are a bit of a dog. I only have 31" ATs, but I do have sliders, full skids, and shrock bumper so the vehicle is heavy. I also live at 5,000' which doesn't help either. Even driving on relatively flat roads I do have to turn off OD on pretty much any slight incline. When I hear the torque converter unlock, I just take it out of OD. It is a bit of a PITA.

Edited to add I have the Calmini exhaust and K&N FIPK which did definitely help when I added them several years ago