i AM GETTING MIXED INFO. ON ZC AND SI COMPATABILITY. OK, I HAVE A 89 DOHC ZC IN MY 89 CIVIC HATCH (NON SI). WILL ALL 89-91 SOHC AND DOHC SI TRANS. BOLT UP CORRECTLY? THANK YOU VERY MUCH!!!!

 

ok is your zc a true zc and not a integra dohc motor if its a true zc you can use any D series trannys buy if its a integra you have you use a B series tranny so to answer your ? you can use that just make sure the splines are correct is all

 

thx for reply man... its a true zc. so b4 i buy the sohc si tranny for my dohc zc, all i need to do is count the splines on both the input and output shafts for verification?
I just think its a lil weird a sohc trans. will bolt up correctly to a dohc motor. I didnt know that was ever accepted

 

how many splines does my zc have u know?

 

i think its 20 if not its 21

 

ok good 2 know... thx a lot man!

 

no worries good luck

 

ugh you guys search. 1988 d series trannies have 21 spline. 89-95 have 20 splines. 1988-1989 uses a smaller flywheel than 90-2000. as long as you have a true zc any non integra d series tranny will bolt up (from 88-2000). However, you will not be able to use the intermediate shaft from the DOHC ZC tranny on a single slam tranny. you'll have to get single slam d series axles that match your knuckles. assuming you have the DOHC ZC trans currently you will more than likely have the larger axle hubs any ways, so just get dx or si axles. but make sure you take your old axle in with you when buying new ones just to be safe.