there is a transmission cooler inside your radiator and it must be leaking. probably replace the whole assembly
"transmission fluid leaking from fitting below radiator cap after replacing radiator on 99 surburban
try the cool line fitting from the radiator to the transmission i just had that problem on a 1994 mercury Sometimes you can leak out of the tailhousing of your transmission if the housing seal is slightly damaged
if you have an automatic transmission there should be cooling lines going to the radiator to cool the transmission fluid the lines could be leaking or the tank could be leaking
The transmission cooler (possibly part of the radiator) has failed.
The AT oil cooler is in the bottom tank of the radiator. If you are seeing oil leaking from one of the lines from and to the transmission connection could be loose.
Depending wether the line going in has an o-ring or if it is just threaded you will either need to replace the o-ring or use a pipe thread compound to seal the fitting.
You have a leaking transmission cooler, usually part of the radiator. The transmission fluid is mixing with the antifreeze turning it pink.
If it is red or brown it is the transmission cooler (in the radiator) leaking. If it is milky white, internal engine oil leaking in to the cooling system, head gaskets.
Replace the fitting.
Coolant? Bad radiator Radiator has a separate cooling tank (usually at the side or bottom of radiator) for transmission fluid. At times this tank ruptures allowing coolant to get into transmission. Most times causing a transmission failure.
either your radiator is leaking,head gaskit is leaking if it's your head gaskit leaking you will have water in your oil or water coming out your exhaust pipe,or you might have a freeze plug going bad.
check your radiator hoses and change gaskets