My first guess is a leak in your automatic transmission fluid cooler lines inside your radiator.
Check your ATF and make sure there's no coolant in it.
But it may be a bad head gasket or cracked head.
Check your oil (do you have coolant in it?).
Do you have a lot of white smoke in your exhaust?
Do a compression test on each cylinder.
Tuesday, April 4th, 2017 AT 8:00 PM