You need the rfe metal thread upgrade and you cal go with synthetic filters
here is the thread. That is the spin on, now the oem sump filter is imo the best just replace with mopar sump filter. For a hot transmission you should look at ester based, which is redline c+ (both ester and pao) which is what I use in my rfe. I did a drop pan and filter change, it took 8 quarts, most people say it took 7 who have done the same.
The one with the hex are the best threads, a lot of guys don't use other upgraded ones
over this one.