I have an NP203 27 spline count off of a TH350, (I hope, well I'm pretty sure that it is). I'm trying to take it apart and I am having trouble doing so. I want to build a doubler for my '72 Chev 4X4 TH350 w/350 motor w/NP205. I've unbolted the helical gear case from the chain case and it is almost coming apart except a bar or maybe it is a linkage bar that goes from one helical gear part of the case to the other part of the case (chain drive part of the case). It is an internal bar connecting the two halves. My questions is how do I get the NP203 case to completely seperate? Anyone out there know how to take an NP203 apart so I can begin to build my doubler?