Supra swap
Not sure why you would want to do this. Anyhow, if you are talking about the newest Supra Turbo [MKIV 93-98]. Then those are 6 speed (V160 Getrag), yes they are plenty strong and can handle upto 700HP easily in stock form. But they will cost you a fortune (over a grand even at junkyard if you can find one). A W58 5 speed from a non turbo will be cheaper (still expensive) but likely give up at around 400HP. A better bet will be a R154 from a MKIII turbo (87-92). They are pretty strong and are much easier to come by.
But again, why would you want to do this? I am not a fan of mixing, keep a mopar to mopar and let a toyota be a toyota. The funny thing is that there are a few Supra drag racer out there who are using 700R4 GM auto tranny at the strip. So what does that tell you?
Some of that is backwards.
The V160 is impossible to retrofit, and rebuilt ones are over $2000.
The W58's are the ones all over the yards, and I can get them for $50 or less each. They would probably handle 400hp as quoted, but the input shaft is too short and the bolt pattern is different and wont fit the AX15 bell.
The R154 is harder to find and more expensive (I paid $350 for mine, IIRC). They will handle much more power, but they do have a weak link in the thrust washer and they shift harder then a W58.
The W58 and R154 are all Aisin transmissions, same as the ones in the Chevy Colorado and Saturn Sky. Seems like even Dodge has started to use Aisin boxes, but I might be wrong on that.
I went the direction of the R154 because the V8 T5 was too expensive in this area ($800+) and I keep seeing Mustangs for sale needing new T5's. Didn't want to build it and have to keep putting boxes in it.
My swap is a little different than most, though. It's behind a slant (or will be). I would have used the W58 if the input shaft had been long enough, but that end up not working out.
In retrospect, the T5 would have been the much easier swap and probably lived fine in my application, but what's the fun if it's easy. :toothy10:
Search on "R154" on Moparts. You should fine lot's of info there, including the guy from Germany.
