I recently purchased a 99 sable and the p.o. put a new radiator in it. after driviind about 100 miles the top trans cooler line popped off the radiator and made a big old mess. how do I reinstall the line to keep this from happening again? it seens to have just come "unplugged" for lack of better terms.

 

It 'may' have not been pushed in all the way to lock in (A definite click should be heard.) and/or the retainer installed, but if the line connector was damaged pulling the line out without using a disconnect tool the fitting sould be replaced to be certain it stays in place..