@lifter01 You may have just helped me figure out my issue. Bought an S60XL that only moves in reverse. It's the Monotrol T42 transmission with the Mazda M4 LPG engine...I've bench-tested the solenoids for forward and reverse and pressure-tested all the ports, but the whole time I never questioned the shiny new-looking RED transmission fluid! I bought some of the tractor hydraulic transmission fluid from the local Walmart and sure enough, it's light brown!! Now, I just need to figure out where the drain plug is...