Yes I have a DYI thread going right now I kind of dropped the ball on it damn near a month ago but I'm going to pick the ball up and start running with it here within the next week. I'd look at definitely pulling it apart first and then ordering the parts. Especially if you have time..
If you have a local shop that sells transmission parts I would go there before I'd go online because generally they build generic kids to fit a lot of models and some models they don't fit and if you have a shop you can go to you can just get the parts you need... Usually cheaper too..
They're quite easy to rebuild....
The thousands of people that are rebuilding their engines on this forum and that is a lot more finickier than rebuilding an automatic transmission. Ya almost can't get it wrong...