My 2003 chrystler goes into park reverse and neutral but wont go into drive

The transmission oil cooler does consist of the left tank of the radiator, as well as an external cooler in front of the air conditioning condenser. If the radiator was a concern and the cooler could have been compromised also, damage to the transmission could have also occurred. But, this is a big guess and there's no way to know what has failed without performing some diagnostic testing with the automatic transmission using tool that has the ability to monitor component operation.