On my way home from work today I got about 2 miles from my house and noticed my trans temp gauge was in the red. Also got a notification on the dash stating "trans fluid hot". As I slowed down for the stop sign it downshifted as though it were in tow/haul mode even though tow/haul was not engaged. For the remainder of the 2 miles to get it home it acted the same way. I just got my truck back from a body shop after hitting a deer. They did replace my trans cooler and both lines going to it. Checked the fluid... its good. No leaks that I could find. Any ideas on what this could be?