Can you put the final drive in the jdm cable trannies such as the S1/J1? What parts is needed or will it just drop in?

 

I would also like to know this. also can you rebuild a cable trannie with itr trannie internals including lsd?

 

No. The S1/J1 trannies are internally different.

 

From what I've read (mostly on this board)
and understood from disassembling a Y1 LSD tranny...

You'll need the JDM countershaft to mate up to your 4.785 ring
gear (or you can use the ATS/SRR stuff)

Of course your differential must bolt up to the final drive -- so
you need at least a hydro GS-R/ITR diff. You will have to grind
out the case a little.

Now here's the important part -- you need matching countershaft
gears for the original gear ratio of your cable mainshaft. That is,
your hydro countershaft gears need to mesh with your cable
mainshaft gears (so the original gear must be maintained)

When all is said and done, you need about ~70% of the ITR tranny
to make this conversion work. It is not cheap to do -- which is
why most people don't do it.

I have never done it myself -- but just read that it is possible.

 

here's JDM_DOHC_SiR's old site http://courtneyeg9.streetracin....html.

 

If I read that correctly, that basically is almost converting the whole tranny over. Does not seem worth it at all since hydro conversion mounts are readily available now.