The OP is not trying to rebuild the transmission himself. He is willing to take it to somebody. It's important at this point to suggest what most of us know by now that the local gear head is probably not a good choice for someone to have look at your Airhead transmission. "Ill probably bring it to an experienced local hand and pay for an opinion." It can be an expensive lesson to learn about these bikes. No mention of how many miles yet on this bike. The original rear oil seals are 37 years old. They almost always leak by the time the transmission bearings are going out or the clutch is worn out. But a figure on mileage or suspected mileage may be helpful. No word yet on how much oil is under the trans on the shelf. The trans is already out. Was the shelf area cleaned? This is sometimes used to determine if further investigation would be advisable. Part of the original post was mention of "noise" suspected to be transmission bearing and the PO has already pulled the transmission because of this. There was also a mention of "loosing power" This sounds more like a slipping clutch than any transmission problem. Send the transmission in the box or take it to Ted Porter. Is this trip doable for you? It looks like an hour away to me on the map but maybe it's two hours. If they know you are coming they can probably look at it and give you advice on what to do next that will fit the situation and condition of this box. If you take the transmission to Ted make sure you have all the pieces with you. He will attach the output flange when the rebuild is finished but if you forget to bring it it becomes difficult for you to have to do because it takes a special tool to take this part off or put it back on. They will be able to mail the completed trans back to you.