Im not going to have you throw parts at it. this isnt going to be a fast process but you are quick at replying to it helps.
you need to get yourself a bi-directional scanner. Autels are pretty good and the chinese tech2's are real good as well. once you have that, start the process like i stated above for the engine.
for the trans, you can drop that trans pan and we can go from there while you wait on the scan tool. check the back of the trans where the electrical connector plugs into the case for oil inside that connector. it will be at the rear, right hand side, large connector.