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Quote (drift freaq @ Oct. 02 2002,10:38)</td></tr><tr><td id="QUOTE"></span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>
Quote </td></tr><tr><td id="QUOTE">It's either 4.083:1 (KA24DE, SR20DE, SR20DET manual) or 3.916:1 (SR20DET automatic), most likely. *There's a smaller chance it's a 4.363:1 unit from a CA18DET.
If you don't mind opening up the diff, you don't have to count the teeth... *IIRC there should be a set of numbers stamped on the ring gear itself.
49/12 = 4.083:1
47/12 = 3.916:1
48/11 = 4.363:1
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ok this correct to a point.
The SR powered Turbo cars i.e. S14 and S15 came with 3.70:1 gears . I also am pretty sure it was the same with the S13 SR20DET cars . The 300zx TT *also came with 3.70:1 gears .
as far as the CA18det ratio's are concerned you are correct</td></tr></table><span id='postcolor'>
according to Sam from jspec.com the s14 silvia LSD differential had the 3.92:1 gear ratio. He indicated to something on the casing of the diff itself referring to that.