| I don't know where Dane's numbers come from, but I know he didn't go measure a "stock" replacement flywheel or a "specialty z" flex plate. But I also know sweet f__k all about how a real automatic Z looks, since I've only ever owned a 5 speed. It is definitely safe to say that a 240mm or 250mm diameter anything bolted to the crank in either an NA or TT, 5 speed or Auto, would never be close to large enough to reach the starter. We know the bell housings for the Auto and 5 speed are slightly different, but I can assure you those numbers Dane posted are incorrect. Maybe Dane can clarify where he got them from? And I bet someone knows all the exact differences in the bell housings. Anyhow, the important thing is your numbers...as that's all you really wanted to know. So... I took a little more time instead of a quick measure, and here's what I've come up with: Stillen Aluminum Flywheel
321mm Specialty-Z Flex Plate
317mm No co-incidence that they match your numbers exactly. 4mm difference. I think you would find that is why you need an automatic bell housing with tranny swaps like the TH400 that can use the Specialty-Z Flex Plate. (Perhaps there are other reasons too) So if you split your difference, and can take 2mm off your starter surface, I think you will be in business. I'm still not clear on exactly what you're doing here, but I assume you've got a 5 speed bell housing. If you were able to just source and use an auto bell housing, I think you'd find it would just "work" with no machining of the starter.
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09:16:44 05/14/11
