Just following up, drove for the first time on a freeway today with the new fan clutch.
It runs much cooler than before but the ambient temp was mid 90s not over 100 like my last time(OP). Pretty much right around 210-212 it would jump up of I passed someone but cool right back down. Get off the freeway and sit at a redlight, right to 215. Sit at another light with limited drive time between it goes to 220-221. Efan kicks on and didn't want to go past that 221 in normal traffic conditions.
I was stuck a long light and got to 221 and within maybe 90-120 seconds it was back to 210 though. Then something odd happened, after maybe another 90 seconds it showed 208 then 206 while driving 45 along a nice stretch lf road. It went back to 210 and stayed but I thought it was odd for it to go from 221 down to 206.
Could the thermostat be maybe acting goofy and not controlling flow, maybe reacting slowly or sticking?
I'm waiting on my hesco pump to do it all at once but in the mean time trying to pay attention to whats going on.