You don't have tranny cooler otherwise you'd see it in front of the condenser. However, it could contribute to overheating if it's clogged with mud, dirt or other debris and keep air from flowing though the rad. I've read where mud can get badly caked up in the gap between the cond and rad that rinsing with a garden hose alone won't get out.
Of course, you need to check the usual suspects as well.