Hello gentlemen, & thanks in advance for your help. Somehow, I've lost a drain plug to my TO-30 transmission. I think I caught it before any real damage was done, but I'm having trouble locating a replacement. It's not the same size as the rest of the plugs which seem to be around 2 inches or so across, the hole appears to be maybe an inch across, or maybe slightly larger than the diameter of a nickle, & is located directly below the gear shifter. A part number would be ideal, but if not, can someone give me a decent size & thread description so I've got something more to go on?