KodSol

Right now I have my d15b7 tranny on the z6, and i know that there are a lot better tranny's for this motor that are stronger and have shorter gearing. i have been hearing 92-00 civic ex tranny or 92-95 si tranny. One that is better than another? There is also a stage 2 clutch on this motor..so the best clutch and tranny pairing would be awesome.

92-95 si tranny would be a Civic si i assume? Oh yea..when I have everything running correctly, I will be boosting the motor. Already have the turbo setup..pretty much ready to run. Thanks. Need it to be hydro tranny too!

Kohen

i believe 96-00 ex/si trannys are the best.
don't take my word for it. just what i read.

edit: btw, i'm sure you can find plenty of information about this by searching.

DCSportEJ1Civic

depends on your set up and what you want out of the car. also are you asking what is the strongest transmission or what will give you the most performance out of your engine.

apexi_rsx

if the motor isnt making more then 200-220 hp i recommend any ex 96-00 transmission. if any more you could get away with longer gears and a dx transmission.96-00 has steel shift forks and 92-95 has aluminum so the 96-00 are alil stronger.

Wrona

Just to correct his because he is right and wrong the 96-00 EX tranny is good for short gears there was no USDM Si in 96-98 and the si came out in 99-00 with a B16A2 DOHC the Canadian Si is the USDM model EX so there was an Si in canda but the DOHC version of the USDM 99-00 Si is called the SIR

the reason i say this is if the OP would not know this and if he would go out and buy a 99-00 si tranny USDM he'd be F'd

You could also go D series motor and B series tranny if you can get the adapter plate fabbed up or find one but the EX tranny would be the best choice

Mitchness

You basically want the tranny that came with the y8. Those have the steel shift forks and shorter gearing.

Jimster480

Y8 transmission, P7A-K4F i think is the code

KodSol

I was thinking about y8. Is there any fabbing that would need to happen with this tranny? As in, from the tranny mounts? Thanks guys. I have been looking, but i don't know what each look like or how they would fit...so its easier just to hear the majority and what they think..thanks again.

Wrona

direct bolt up

KodSol

AWESOME! Thanks again guys

94EG8

No, simply reuse your old mounts, it's a simple replace one with the other swap.

As for what tranny? Z6 or Y8, they're both basically geared the same, big bearing case etc. Z6 has aluminum forks (I've only personally seen one of these with a broken fork) Y8 has steel forks that bend and wear (every single Y7/Y8 tranny I've pulled apart the 3rd/4th fork was worn past the service limit, I've never seen wear issues with aluminum forks) basically pick your poison, steel forks aren't really necessarily better than aluminum, they just fail in different ways.