Transmission oil cooler line @ Radiator
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It looks like it may be a quick disconnect similar to the fuel filter, however my fuel filter tool will not work. The cooler line will move in and out of the radiator about 1/8 of an inch. The clearance between the line and where it enters the radiator is tight. To small for any disconnect tool that I have seen. The repair manual shows a flared nut, but mine is different than any that I have ever seen