Probably about a quart as long as you keep the fluid from draining out of the cooling lines once you disconnect them.
You have a leaking transmission cooler, usually part of the radiator. The transmission fluid is mixing with the antifreeze turning it pink.
Mercron transmission fluid is used in a 1978 Ford Thunderbird. Type F fluid can also be used but should not be mixed.
You need a new radiator if you have trans fluid in the radiator. Getting trans fluid in the radiator isn't such a big deal...just change the radiator.....the worrisome parts is getting coolant in the transmission. The radiator has a transmission cooler built in and it is separated with a wall of aluminum - the coolant and trans sides should never mix. First! You need to drain and remove the radiator and replace it with new fluid. If you got trans fluid in the radiator, it very likely means you got the inverse....coolant in the transmission. You also need to flush and drain the transmission. Also, you need to flush the transmission cooler lines out for any coolant. Coolant in the trans is often the death of a transmission. Make sure you use the right fluid in the trans. That vehicle takes Mercon V fluid - don't put anything else in there or you will have problems potentially.
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.
The 2 lines that come from the transmission and go to the radiator are full of transmission fluid and the radiator is what cools it.
change it! though could be mixing with your radiator fluid (green+red=brown) not good
check your radiator hoses and change gaskets
You will refill the transmission fluid in 1990 Thunderbird in the fluid case found in the bonnet of the car. You should ensure that it is about 1/4 inch below the fill plug hole.Ê
You replace the radiator
Fluid Connector
Mercon V
"transmission fluid leaking from fitting below radiator cap after replacing radiator on 99 surburban