efVTECsedan

i have a 90 lx sedan with a d15b VTEC. i was wondering if the zc cable tranny has shorter gears or any other differences than lx tranny. i have to get a different tranny because mine is about to crap out.

USDM CRX DX-R

I believe the ZC transmission does indeed have shorter gearing. Just keep in mind that the ZC transmission requires different axles than a DX transmission. It actually uses an equal length setup similar to B-series motors. Also, the D15B block may or may not even have bolt holes to mount the intermediate shaft to the back of the block. So a ZC transmission may not even be possible. Your best bet would be to simply run a 1988-1991 SI transmission if shorter gearing is what you want.

phyregod

Werd. yes, shorter, better gearing. totally possible with parts.

Calesta

Effin Motorworks will stuff ZC guts and new synchros into an Si transmission for pretty cheap. Good guys.

K2e2vin

Only the DOHC ZC and CG(won't work correctly with regular D-series)has the shorter gears. The SOHC ZC has gears similar to the Si/DX. Only differences are the final drives:
Gear Ratios

The D15B(and from my experience non of the 88-91 D15s) have holes for the Intermediate shaft, which is different from the B-series one but works with the 90-93 Integra axles. It's not necessary to use the intermediate shaft and Teg axles. What you can do is swap in a big-bearing(EX/Si) differential and countershaft. This will improve the acceleration(from 3.888 to 4.25) and allow you to run the stock axles. This is what I did, but chose a 92-95 EX differential due to the 88-91 differentials having a weak differential pin. Remember to check the shim clearance!

__________________
1988 Honda Civic Standard-Hiatus
1992 Honda Accord LX-DD

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Jon Eban Nie, August 31, 1991 - May 7, 2006
Y-Daniel Siu Eban, September 7, 1986 - May 7, 2006