5. Buy the FSM asap.

There are two hoses on either side of the engine that connect between the transmission and the radiator, one side of which is a separate ATF cooler. It is likely that that hose is leaking which you can easily replace. You have a dealer in Germantown I think, which is where to get the hose (or mail order from Phil here).

It is possible for a driveway mechanic to replace the self leveling valve, but you need open end box wrenches (to avoid distorting the connectors on the hydraulic lines), and you need to bleed the system after you replace the valve.

Search here for that bleeding procedure, And I strongly rec you get the FSM on CD to not screw things up.

I'll see if I can attach a pdf of the replacement steps from FSM.