I know its a silly question, but did you try to tighten the compression fittings? Or is it cracked behind the threaded part where it goes into the cooler?
I have changed mine, its a pretty straight forward process. Remove old and install new.
job is easy. i pulled the oil cooler to replace the leaking tranny cooler.
IIRC, they use o rings, not a compression fitting per say. so over tightening them will make them leak like a bad fitting anyways.
good luck, and have plenty of brake cleaner at hand, it gets messy down in there :shhh: