Do you mean the number of splines on the stub axles that go into the diff housing, or the number of splines on the shaft going into the inner / outer CV's?
Doesn't answer your question but might come in handy... copied it down while looking for diff info a while back.
Based on info found here:
Toyota Supra MKIV : MKIV Specifications
and here:
JZA80 Specifications Home
Crown wheel
A01 / A02 /A03: 8" (200mm)
B03: 8.7" (220mm)
Reduction gear ratio
A01: 4.083
A02: 3.769
A03: 3.266
B03: 3.266
Note: USDM A03/B03 have a 3.133 ratio.
Crown wheel teeth
All: 49
Note: USDM B03B / A03B have 47 teeth.
Pinion teeth
A01: 12
A02: 13
A03: 15
B03: 15
No. of Torsen LSD Helical gears:
Before 1996/4
A01B / A02B / B03B: 6
After 1996/4
A01B/A02B/ A03B: 8
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