Agreed. Something is wrong with that tranny- also may be clutch issues too.
Not wanting to belabor the point, but if it has a FMC (ram/bean) pump, get a couple quotes
on major pump work, not just price, but turnaround time. I think that should sway you.
I was once told by a remount shop to add 30 to 50 % to the quote/bid price. They said even with a detailed inspection that there are things they couldn't see and there would be problems that wasn't in the quote/bid. In a remount problems equals money.