Just a tip, the NVT350 Tranny our 420A uses, is recommended by the dealer to run Chrysler ATF 3 or 4, I know auto fluid in a MTX. Or what I've gathered from many forums & Chrysler websites, Amsoil Synchromesh Transmission Fluid 5W30. It is great stuff, and currently is the Most Recommended Fluid.
In my 160,000 mile beaten up tranny, Amsoil made it feel like new, I'm telling you, buttery shifting, no grinds, its good stuff. Although Running any Synthetic if you leak fluid already, synthetic's will make it worse.
Anyways, Just for next time, or if you feel like doing it again.
Lastly, if you ended up filling it up the turkey baster method with the wheel off, it is much easer to take a small funnel, and the Proper Length/Size Hose, connect the two, clamps not needed, and put that in the fill hole down the side of the Engine Bay. So much easier/quicker than sitting there with a half ounce of fluid filled every time, you could imagine it gets old quick.
EDIT: If you need help locating an AMSOIL dealer, just p.m me.
