Trans Fluid to Use?

Castro’s makes a really nice atf+4 I use.
I also have used in Chrysler automatics Allison atf used in big trucks 2004 and newer. Works great, loves the heat and shifts are crisp and clean.
Expensive too, like $12 per quart but a really nice product. Transynd. Is the name and it is a full synthetic. Big trucks pulling 400-1000hp and loaded upto 80,000lbs go 100,000miles on it.
Joe