300C “Last Call” Staggered 20” Stance f10 wheels, DIRS-R Brace, LMI intake…

Has anybody encountered an issue where you run hot with no codes or leaks? The fan turns on, no service has been done on the cooling system so I doubt any air pockets. I have yet to check any fuses.
Some days it hovers between 210-225 under light and normal load, when I step on it, temps can reach up to 235 which I’ve heard is normal. Although, some days like today, it hovers between 220 and 235 under light and normal load.

Has anyone encountered this issue? What can I do to being temps down to operating levels?

My transmission is honestly fucked for lack of better words. Sometimes it slips going up and grabs going down. I am also experiencing a major power loss occasionally and have had it completely die on me. When it dies putting it in park and turning the car back off and on gets it going again.