Any Gl5 oil can be used, type 2 can even use straight ATF. Torsen *advises* the use of changing viscosities to move around the ratio withing the gearing designs. Additionally, Type 2's can use clutch packs, both can use shims to increase the ratio.

The TBR falls off around .6 with break in. Retailers won't tell you that. As I said, old-old discussion.

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