I have a transmission cooling line leak at the metal to hose crimp fitting. It is the hose that connects to the upper radiator location. Planning to replace the hose & wondering how big of a job it is & if there are any surprises to expect. I’m familiar with the quick disconnect fittings & tool used to disconnect the hoses from the trans & radiator. Not sure how much fluid I should expect to loose or if I should replace both hoses while I’m at it (125000 miles) or should I replace the fittings as well. Any advice would be appreciated.