I have a 2010 Crown Vic P7B (interceptor package) with around 113k miles on the clock, the trans fluid appears to have been maintained being that it doesn’t appear dark on the dipstick, looks fairly fresh, and the trans shifts firm. I believe this is the 4R75E transmission and with that said i plan to do 3 drain and fills with motorcraft Mercon LV fluid, the first fill I’ll be replacing the fluid filter and the oil pan with one that has a drain plug for future drains, after I do this I thought of switching over to amsoil atf and maybe lubegard red or platinum or not depends on what everyone thinks I should go with thanks in advance