[piscator]

Jack, thank you! "No 4th generally means low pressure" -- that's interesting. I'm so ignorant of automatic transmissions, that's it's embarrassing! And, I actually own a tech 2 scanner. I used the tech 2 to bleed my brakes, but haven't learned how to use it for much more than that.

I'll probably turn this over to my local mechanic friend who is also a muscle car guy. It will be expensive, but he's good and I just have too much on my plate putting the Porsche back together. My friend likes to use a local transmission rebuild shop that has a longstanding reputation with the drag-strip community. I have a feeling my transmission is heading there.

If my transmission needs rebuilding (as I suspect it will) are there modifications that will make the gearbox faster/better? Later GMC Sierras had a 6 speed trans. I can't help but wonder if this is a possible or beneficial retrofit. If the answer to that is obvious, I apologize for my ignorance!