I’ve had my 2001 trans in and out 5 times, left an o-ring out the first time for the lock up, burnt the front clutch out. The trans is more complicated than the reg 727 mainly in the VB and OD. The clearances in the OD have to be spot on and measuring that takes special tools (made mine) the OD also takes a big press to service the spring and clutches, once out replace spragg and Torrington bearings. I can do one now real good but it was a learning experience (I could do the 727 blind folded) best leave it to someone you KNOW is good with these trans.