$2000 to rebuild a 722?
You have to be kidding, they're not that complex AT ALL. The converter doesn't need to be rebuilt (no lockup clutch), just a flush will do, MAYBE a rebalance. Figure $250-400 to yank the unit itself.
I was going to spend a few Bens to reseal them all (the SDL leaks like crazy) and since they're out I may as well replace the two clutch packs in there behind the pump. They're already out and such.
As I recall first, second, and reverse are all using bands, I still have yet to see a band wear out after many, many, many years + miles. I will not replace mine. The "Banner" rebuild kit with paper + rubber and two clutch packs is only around $180 from Bulk-part.com. I can't recall if it's Alto frictions or BW. Either way, they're fine. Figure maybe $100 more for thrust bearings too. Maybe a new TV Cable also.