I was just reading through the thread and thought I should clarify something I keep repeating, as well as share a little history as I know it to be. This is for those of you that believe God is in the details, not the devil.
Technically speaking this engine is not coming from a Toyota Supra that you could buy in the US. It is from a mid 90s (OBDI) Toyota Aristo (same as a Lexus GS300) that was likely a cab in Japan. I don't know exactly what year or mileage either, which is why valve seals, front and rear mains, timing belt, and water pump will (hopefully) all be replaced prior to installation into the Jeep. This is, however, the famous 2JZ-GTE that made the twin turbo Supras famous in the import world, only with ceramic turbo impellers instead of steel, slightly smaller cams, and lower cc injectors. The Japanese Domestic Market (JDM) specification 2JZ-GTE was rated at 280 hp, while the USDM version was 320hp, I think. This was due to a gentleman's agreement between the large Japanese automakers like Nissan, Toyota, Honda, etc., who were competing in their own racing circuits. This didn't apply to the US market, so they made ours with more power, cause we like it like that. JDM is what you want though, because the US specced 2Js are now made in Mexico, and to much lower tolerances. These are generally regarded as unusable amongst my coworkers. The JDM 2Js are made in Japan and well built. I've got someone even donating a spare set of USDM cams for mine. As far as the trannys are concerned, they are both Aisin-Warners. The Toyota version is tagged "30-40le", while the Jeep version is stamped "30-43le". After acquiring the tech service manuals for both and studying them for differences, I am willing to bet that I simply need to swap the tail section and output shaft from one to the other. I also think that the difference as indicated by the nomenclature (40 and 43) is the 40le is a 2wd version and the 43le is a 4wd version. This assertion will be confirmed or ammended soon. The Toyo version also has an extra solenoid and wires, basically being some more bells and whistles that help regulate line pressure differently.
So anyway, that's what's going in.
This stage has already been a long time coming. This presumably simple yet difficult step should be done by the end of the week. The Toyota tranny is at my shop and we are going to see how this hard part swap works out. This is critical to the entire project, since I'm not trying to make a 2WD only Jeep. While we are at it, I will be making all the modifications that come with the Boost Logic auto tranny upgrade, making the transmission supposedly able to handle around 800 wheel horsepower.
It almost strikes me as odd that I can't find any more of this type of swap in the US. Does anyone know of any? I've located one in the Middle East, and one in China. I can't believe I'll be the only one in the Americas, let alone the Western Hemisphere. Seems like a statistical improbability, especially when I look at the whole thing. It's a straight six, the trannies are nearly identical, it's crazy power potential and it fits. For an all-around, rough and tumble, beat up the streets, drive through crowds of zombie apocalypse, do what the bleep you want kind of vehicle, (obviously not suited for rock-crawling or related uses that would be better suited to low-end torque) a Jeep with a bleeping 2J just makes sense to me.
It will be rowdy and glorious.
