[TheEdgeofSanity]

I would say for your sake, I would just go for the auto 4T40 to avoid a complete overhaul. In the mean time though, I would drop your tranny pan and change the fluid out and filter out. You'd be surprised what a clogged up tranny filter can do. When I got my car, I was nearly sure my transmission was gone because it slipped so bad and after having new fluid and filter, its gone another 50K with no issues. just saying, easy maintenance before huge undertaking!