Just a DIY tip that may help someone out sometime.
When I was takeing my transmission out today, the cooler lines kept dripping in all orifices on my head. I could not find anything to plug them, until I saw a pair of disposible ear plugs. They are the little foam ones with a plastic tether. I rolled them between my fingers until they were small enough, stuck them in the ends of the lines and watched them swell up. No mor tranny juice in my ear. I left a little of the string attached, so that I can easily remove them at time of reassembly. Try it.