Did you check the transmission dipstick?Yeah I am definitely not going to make that mistake again.
I put in a new radiator, added a transmission cooler, replaced thermostat and refilled with 2 gallons of coolant. She started up and ran, drove about 20 miles- town and interstate. Everything seems to be running fine...is there something specific I should keep an eye out for?
Thanks everyone for your help!
You did not mention anything funky with the remaining fluid during rad/trans cooler install.
If the engine runs fine, would it be smart to drain/fill the transmission to triple check that no coolant got mixed?