[naterry]

I found this post in the thread below on Club Lexus. Does anyone here know if the M6 MKIV Supra TT Diff will fit in the ISF Pumpkin?

http://www.clublexus.com/forums/is-f/553863-rear-end.html

the isf has a unusualy larege ( for toyota ) pinion gear so there are no other gear options available as of yet.. but a NA or auto TT supra differental will bolt right up in to the F and they offer 4.09 and 3.76 ratios and a real torsen LSD, all you have to do is swap the outer axle u joints from the F to the supra axles.. however when in M mode the F gets its manual shift point limits from wheel speed so there is a chance you can ove rev the engine with a numericaly higher ratio:sad: