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Old 09-16-2019, 10:46 AM   #9
duballstar37
Zilvia Junkie
 
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Quote:
Originally Posted by Kingtal0n View Post
you can get two different 5-speeds in the same year

some have reverse synchros, some not,
some have different 5th gear ratios
some have updated shift fork hardware
silvia trans is similar to but many differences from KA trans including synchro rings

The only really important thing that makes any difference is the gear ratio of 5th, and the fork if you can get the good ones, or install a good 5th fork (they break and lead to infamous 5th grind)
The s13 trans have shorter ratios, the S14 trans has a better cruise ratio, so we always want the identify and use the better overdrive for economy

spin output shaft vs input shaft and try to identify the ratio of 5th
Can you please elaborate on the difference in gear ratios between S13 and S14 transmissions? I swapped a S14 KA trans onto my S13 SR (swapped the bellhousing) and the gearing felt identical.
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