More Pink Milkshake

I have my own pink milkshake story, hopefully wont be too long. I happen to work at a auto repair shop in the parts department. In Feb of 2020 I was on my way to work and about 1/2 mile away as pulled away from a stop light I felt the tranny slip a little. At the next light same thing happened.
So I pull in to work and leave the truck running so I can check trans fluid. Open the hood and see the pink milkshake flowing out of the coolant overflow bottle. I think CRAP this isn't good.
They pull the truck in, replace radiator, hoses, and thermostat. Flush trans on a machine twice before fluid starts to look clean and clear. I drove it about 500 miles over a couple of weeks without any problems and then flushed one more time. Since then I have pulled my camper several times and once from OH to TN and back with no problems at all. Shifts great and trans temps stays between 190F and 220F. So I guess long story short... I got lucky!!