Guys this thing is common sump,has the overflow tube in lift box down to granny,at bottom of sump is a bolted on plate with drain on one side and pump suction connects to other side,returns in top lift box.
Bad news is I noticed it wasn't draining well after rinsing with diesel,so I removed plate and found an o ring,gets worse,27 gear teeth.so pulled top shift plate,third gear wiped out.must been some manufacturing defect as it was only problem seen
Teeth were brittle.