Leaking trans fluid off the radiator

there is a cooler for the trans fluid that runs threw the f the radiator the cooler splits and trans pressure being higher while running pushes into the coolant how ever as it cools down the coolant pressure can push the coolant into the trans so see if the trans fluid looks like a straw beery milk shake if so try and keep flushing the trans until the fluid is clean and fresh if the trans makes it threw the coolant then you will need to flush the cooling system i use pinesol it breaks down the oil

some cars crack heads like saturn s series the satun v-6 blows out oil coolers as well as saab v-6 some cars have the intake gaskets leak if it has a oil cooler in the raid it could fail as well don't know what your working on if the oil looks pink check the trans fluid the trans coolers fail as well

Your transmission cooler in the radiator tank is probably leaking, A radiator shop could probably replace the cooler but if the radiator is old you should replace the whole thing.

Your trans cooler is located inside one of the radiator tanks and would be expensive to replace.
You can either replace the radiator with new or used or cut the lines and install an external cooler as is used for towing. If the cooler in the radiator is leaking, you need to flush the system to remove as much oil as possible or it will cause hoses to soften and fail. Also wise to change trans fluid as well.
Always use double clamps when running rubber lines for cooler so they don't slide apart under pressure.

that means trans fluid or engine oil is getting into cooant system. Not good. Either a leaky trans cooler in the radiator or a blown head gasket. Hope it's the trans cooler

it is a trans cooler look and see if it looks like a small radiator with two hoses runing to it

Check your oil dipstick and make sure it does not have coolant in it or whiteish stuff on it. This is indicative of a head gasket leak.

If it is trans fluid the cooler inside your radiator must have a leek. Yes it is possible for it to get itno the trans. Check to see if the fluid is milky.

The red fluid is transmission fluid, check the transmission fluid level, if it get's to low the transmission will burn out and your looking at a expensive job.
The fluid could be leaking from the transmission cooler line to the radiator in front of the car. Have it repaired and keep an eye on the fluid level to the transmission. Note: transmission fluid is flammable and may catch fire if slashed on to any hot area's like the exhaust.
Good luck and hope this helps.

Does the oil in the radiator look reddish? likely it does...You most likely have a failure inside the radiator where the trans cooler coil runs through it. Replace radiator and have trans fluid changed and flushed. If slipping continues trans will need a rebuild. (hope not)