the 6th speed gearing is the same for z3 as the tsx 6th in the a3 tranny (already stated)
idk how your going about it, but if you do any wrenching, and have the money, its probably better if you just swap the z3. im going the other route because i'm doing all the work myself. for $900 i have a new 3rd, 6th, and an LSD.
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