Although Maxlife seems to be magical and work in just about everything you put it in, I tend to try to use it in applications that are closer to its spec rather than further. Viscosity wise maxlife is around 5.9 cst whereas atf +4 is 7.something, and by way of friction modifiers atf+4 is very heavily modified whereas im not quite as sure about maxlife. I try to use it in more dextron 6, mercon lv and sp4 applications but that is just me. With the availability and price of some of the atf +4 you may as well stick to it, with Chrysler licensing different manufacturers you can get it pretty much just as cheap. When the factory fluid is good, cheap and available why use anything else? but that's just my opinions.