Hey guys I just bought a 2004 Buick Lesabre with 47k miles - these cars come with the 4T65e transmission. No transmission issues; shifts fine. I want this car to last long, so I figure I should start by dealing with the transmission fluid. Not sure if it has been changed in this car before but probably not. My research tells me I should just drop the pan as it is safest. Some say it's a good idea to drop pan 3 times(while driving a bit between changes) becuase a pan drop on changes something line just of 50% of the fluid so doing it 3 times means like 90% of fluid is new-Anyone else do this? I am wondering what fluid is best? My research has also lead me to discover the installation of an inline filter. Any experiences with that? Is this tried and trued, no issues? Thanks!