rumble
I read the .59, but didnt clue in.
The Mopar auto-trannys suffer from large rpm drops too,especially the low gear ones. But a higher stall TC is a good work-round. Its tougher when the clutch dont slip.
If I was going auto-o/d, Id go GM. They make it so easy now.
Problem is the $$$. You'd have gear vendors levels in a trans that isn't really any better than a built 500/518 that'd be a few hundred and has cheap cores. The 500/518 4th is .69 and then the usual 2.7/1.54/1 and 2.45/1.45/1 gears respectively.
Even the app changes what you'd want to have in it immensely. I'd have not one problem with 4.10s or 4.30s and a 904 in a Cherokee with 28s or 29s but on the otherhand 3.55s in a car without OD and tires in the 25-27" range is something I hate and in a truck- I'd like to be more conservative than that as well if it's gonna see the street much.