Rinse all the coolant off the engine and radiator. After letting everything dry thoroughly, start the engine with the hood up, and watch for leaks. With this much coolant leaking you should easily find the leak.
Antifreeze is green in color and is leaking from your radiator .
Leaking radiator? Leaking or loose radiator hose?
ah.......radiator??
The transmission cooler (possibly part of the radiator) has failed.
then you should have your radiator flushed because you have rust in it. FYI: antifreeze can strip the paint off of your it you spill it. Also, you may need to replace your radiator if the antifreeze is leaking, it may be through a rusted/corroded portion of the radiator.
check your radiator hoses and change gaskets
The only way to find out is to have a look it could be anything.
Call Around; Find A Radiator Shop or A Mechanic That Can Pressure Test Your Radiator. This Should Help
There are several reason why a car might lose antifreeze. The water pump might be bad, one of the radiator hoses could be leaking, the radiator could have a leak, a freeze plug could be leaking, or it could have a blown head gasket.
You likely need to replace your radiator cap - the rubber seal in the cap is worn.
antifreeze does not enter the engine at any time. locate and follow your radiator hoses and follow then and check for cracks or punctures.
Is it leaking from the water pump or radiator? Is the system properly pressurized?