ok i wanna swap the cooler lines for the tranny from my blazer to my truck cause mine need replacing..and the ones in the blazer are like new. what do i need to drain? tranny fliud or anything? or can i just boltem of and switchem or what? and how excatly does a tranny cooler hook up? does the line go from the tranny to the cooler..then to the rediator and then back to the tranny or something? cause i ordered a b&m 24,000 GVW super cooler for it..