[fooddude]

Originally Posted by PantsDants

Correct, the only thing to note is that the IS300 carrier will have axle stubs (half-shafts, wheel-looking things) that will need to be popped out. On the IS, the axles bolt onto these, but on the 86, our axles spline straight into the carrier.

...but JUST to make certain, you're talking about just swapping carriers right? Like drop pumpkin #1 from your car, install pumpkin #2 into car, done? If you're talking about swapping the actual differential out of the carrier, I can't say with 100% certainty that that will work. It SHOULD, considering the IS300 and 86 carriers both contain T2 Torsen differentials, I'm just not 100% on if they bolt up the same internally.

I thought I read somewhere that only JDM IS300's have the 4.56 in certain models and none of the USDM IS300s had 4.56; hence, you won't find any 4.56 pumpkins in american junkyards. I could be wrong though or may have thought incorrectly.