Please be careful of going this route. My advice is to do more research and survey first (the most reliable way is to get a manual Z if you don't have preference for the autotransmission). I'd suggest you stay away from those so-called performance transmission rebuilds unless you can see what they will do to your transmission or "your living nearby and you don't mind back-and-forth troubleshooting". Otherwise it's very much advisable that you don't trust any of them easily. PM me if you want to know my story.