Hi all, Got a VP commodore V6. I have a coolant leak only once it is at operating temp. Once cooled down it doesn't leak. It is from the rear of the engine dripping down near the tranny (auto). I've had a look at the rear of the engine and can't see any visible leaks. Im not sure where it is coming from as the only visible leaks are coming from around the tranny housing. Rough idle and doesn't seem to be holding pressure in cooling system. Thanks in advance!