On the MCX, trust me you have a hose connection for the exhaust risers, it is probably routed across the tranny. From the back base of the exhaust you should have 2 hose connections, follow this and you will see the hose split/connection to drain.
The transmission cooler will be on the starboard side, rear, there is a J hose that connects to the bottom of the cooler, remove this hose to drain and clean out the screen with your finger, it does not remove. To find the cooler, again from the tranny, follow the two oil lines back, they end up at the tranny cooler. You should also, remove and drain the J hose on the port side that runs from the impeller to the thermostat.
If you are just dry blocking, make sure drive it around up and down some hills to make sure you have all the water out. Do you have a heater, because this needs to be blown out also?