RE: When oil comes out of the bell housing plug?
Remove the rubber plug and clean up the leakage as much as possible. Turn the engine over while looking through the hole at the torque converter. Look for a small 1/8" pipe plug in the torque converter. The plug may be leaking, or you could have a leak from the transmission front seal, a pump to case bolt, the torque converter housing seam or a converter to flywheel stud weld.
From the manual:
When a converter drain plug leaks, remove the drain plug with a six-point wrench. Coat the threads with Pipe Sealant with Teflon® D8AZ-19554-A (ESG-M4G194-A and ESR-M18P7-A) or equivalent and install plug. Tighten the drain plug to 28-30 N-m (21-23 lb-ft). Fluid leakage from the converter housing may also be caused by engine oil leaking past the rear main bearing seal, or from oil galley plugs. Verify the exact cause of the leak before starting service procedures.