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The differential is for an Auto TT or NA Supra. It is 10 bolt, like the stock SC diff. The LSD is factory Toyota TORSEN. The pumpkin and 4.27 ring & pinion gears are from a 60k-mile SC300 AT. The project link in my signature includes a detailed build of what is being sold.
This is a deal for anyone looking for a Torsen Diff. These suckers weigh a ton so $700 shipped is a great deal. Plus it has the 4.27 rear end, your going to fly off the line with that in an SC400.