To keep the pickup tube from interfering, simply remove the oil level sensor before pulling the pan.
On the trans. Pick up a set of channel plate gaskets. Then go in and replace the 4th hub clutch shaft. Frequently you can pick them up off Ebay for $45ish. Pull the side pan, oil pump, then take the valve body and channel plate together. That way you don't deal with the checkballs or two more gaskets. Zip up the 4th clutches and slide in the new shaft. Reassemble and enjoy knowing you won't lose 4th due to sheared splines.
