Some have an internal transmission cooler & extra small internal radiator for that purpose.
You replace the radiator
This is a sealed transmission. It does not have a dip stick. Read the manual. sometimes that sealed transmission leaks by way of the radiator
Check your transmission fluid levels. Look around for leaks...you'll see a reddish fluid around the drive axle on your transmission or around the radiator.
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.
"transmission fluid leaking from fitting below radiator cap after replacing radiator on 99 surburban
Fluid Connector
No. Transmission fluid lubricates the transmission. Coolant is used by the radiator to cool the engine.
You've probably got either a bad head gasket of a cracked head.That's the only place where the oil and coolant come in close contact. It may be transmission fluid if you have an automatic transmission - check your trans fluid level, and check for milky looking appearance to the trans fluid. The transmission cooler is integrated into the radiator and leaks can develop between the two.
This is transmission fluid. The leak is at the transmission cooler which may be part of the radiator.
repair the leak
transmission cooler
the cooling tank in the radiator for the transmission is bad