........the AW4 tranny fluid flow in the '98 FSM (possibly others) is partly incorrect. The diagram shows the hot fluid leaving the tranny correctly but shows the fluid entering the top connector at the rad cooler.....this is incorrect. Hot fluid that leaves the tranny enters the rad cooler at the bottom connector, exits the rad cooler at the top connector and either returns to the tranny or goes to the optional (rare) factory auxiliary cooler, then to the tranny. No biggy unless u install an aftermarket tranny cooler as u want it to be installed like the optional factory auxiliary cooler....AFTER the rad cooler.