Need Help Removing Shell from MTH Premier 20-94366 A. R. T. Reefer

There should be one philips head screw at each corner of the underframe. They are difficult to see because the screws are countersunk so deeply. Try a flashlight pointing downward at each corner, with the car up-side-down, and you should see the four holes with the philips head screw deep down in the hole. The screws are actually "jis", but a good philips head screwdriver should work if you do not own any "jis"  drivers. 

Try turning the trucks as far to side as they will go. The holes are under the trucks rather than near the corners. It took me a while to find them as well.

Pete

Thanks Hot Water and Pete.  Turned the trucks way to the side and what to my wondering eyes should appear but four screw holes with deeply recessed screws located  about 1 inch from the ends normally covered by the truck side frames.  Now that I know where they are it's easy to see them thu spaces in the trucks.  Duh!  Thanks!!