You'd need to know the pressures inside... if the servo pressure is low, it won't clamp a band to complete a shift, or it may let a clutch pack slip.. there are to many scenarios to even guess.. and I haven't been inside a mopar tranny in decades!!! But I wouldn't drive it if it were mine!

There was a big tranny shop in Las Vegas - they may have an answer? I'm wondering if anyone swaps out the valve body with an older series to get away from the computer....

It's a shame he's gone this far in the build on such bad advice! While costly, maybe revert back to the fuel injection and engine management computer with trands controls...??..?

Now is he also helping you get your car completed? LOL...