All of RP's products are a great investment. With that said there is a certain additive in the chrysler fluid for the NTV-350 transmission that protects the synchro's. You are not suppossed to use any other fluid than that which mitsu and chrysler sell for our cars. If you want to know specifics on the internals of your tranny, Terry (StarTurboTalon) rebuilds them himself. I'm sure there's nothing about them he doesn't know.

-Kevin