From what I know, which is only from seeing Rick's new kit and shaft, is that they shortened the new shaft mount and cover by about a half an inch total to get the SC moved up tighter against a longer section of the splines. If you notice on most failed drive splines I've seen, they're missing about 1/2" of good splines. They also treated the shaft splines somehow, not sure if by chemical coating or heat/cold process. That's what they did for the stripping issue.
The seal issues = oil in the output side of the SC. They were thinking it was being caused by the dry start up for a few seconds when the engine was first started. The modified feed position of the filter/cooler location lowers feed pressure while also getting oil sooner than the head feed. This eliminates to high of feed pressure and lessens the dry start up time. The oil return line modification takes away the possability of a blocked return line... why chance it?
I would think contacting Vortech for direct answers would be the best solution. Mark and Terry have been very helpful with helping Rick and I come up with this info, but I'm not sure how much is official Votech statement and how much is Terry Haines or Mark Rowe talking about their own experiences. I'm only speaking of what I've seen and done to help Rick's car. I have not talked with Vortech about these issues since, in the past, they've been less than helpful to me.
