ATF+3 verses ATF+4
I'm going to service my 2001 Durango transmission. I went to the auto parts store and they tell me I need ATF+4, but they don't carry it and can't even get it yet. My question is where can I get ATF+4 and do I really need it? Can I instead use ATF+3, and if I use AFT+3 will I need some sort of additive and what kind and where would I get it?