Most vehicles have a coolant reservoir (a clear plastic tub) with a phrase "engine coolant only" printed on the cap. This is where you should add engine coolant.
NO just Coolant
The transmission fluid cooled by routing it through the radiator. The fluid probably is a milky color because the radiator had failed internally allowing the coolant and transmission fluid to mix. Check the coolant and if looks milky change the radiator, coolant, and transmission fluid.
No. Transmission fluid lubricates the transmission. Coolant is used by the radiator to cool the engine.
Coolant is a fluid at a lower temperature than the process that can be used in heat exchangers. Refrigerants are materials which can go through a refrigerant cycle.
this is normal,because the coolant temp sensor is supposed to be in direct contact with the cooling fluid in order to read its temperature
This is an easy one... Is the fluid green? if it is, it's coolant.. if not, its brake fluid.
Coolant should not be leaking from your transmission the only fluid in your transmission is transmission fluid. A faulty transmission seal can allow transmission fluid to leak out.
Remove the coolant reservoir, flush it out, reinstall it and refill with proper coolant.
because it's used in your engine as coolant
THe fluid will need flushed and changed.
This fluid can leak from many places. Look in places where water hoses meet the engine, where the heater hoses go into the firewall, the radiator and your heater core.
Make sure the coolant level is ok, add fluid if needed, that should make the light to go out if light still on you will probably have a bad coolant level switch and will meed to replace it