Thank you both for answers.

Is there somewhere online I might be able to find a service manual for one of these critters? What kind of fluid does this lift take?

I can rebuild C-6's, Turbo 350's and TorqFlights, with the book, of course, but I've never got into a lift tranny...probably a whole different ball game, huh?

I am starting to think that they may have to have this one hauled in for a rebuild. I hate to give the business away, but I'd rather the customer get what's needed the first time, and the customer know that when I reach the edge of the realm of my knowledge, I'm humble enough to say, "I don't know. I recommend that you have a specialist look at this."