940 rebuild... should I?

Again I recommend if you have a transmission Parts Warehouse or anything like that close by to get your kit there. If you have to go get replacement parts or anything it's a lot easier to be able to drive there. That could be a big if also because I just happen to live in a town that has two pretty comprehensive transmission warehouses.
And yeah that's mechanics 101 take it apart and have the parts match up at the parts store.

I'm in Charleston, SC so unfortunately there's really nothing around as far as transmission warehouses. There's a couple of mom and pops shops that SAY they're transmission parts places but in reality they're not much of anything and it's mostly newer stuff.

When I first picked up the car the transmission wouldn't shift at all, turned out there was no fluid in it, so I took it to a shop that also said they were a parts store, they did a service to it, drained whatever was left in the pan, changed the filter and put fluid in it. Said it was shifting, so I paid and drove it home, shifted into 3rd by 10 miles an hour and I knew something else was wrong. Posted some pictures online here and someone saw the linkage for the TV was missing, so the transmission shop missed that and someone somewhere else in the country picked up on it from a picture. Didn't leave me with a warm and fuzzy feeling about that transmission shop/parts store.