What are the options available to change from the stock 930 4 speed tranny to a 5 speed?
I want to increase the performance and think that the tranny is probably the best bang ofr the buck over other engine mods which most guys do.
I intend to DE the car and the extra 5th gear should make a better spread to keep me in the power band.
I would like to keep the cable clutch and don;t want to start converting to hydraulics if that is possible.
Any advice on vendors that supply the 5 speed conversions would be appreciated.

 

How much power do you or will you have?
It "may" be a better choice to add an 8:32 R&P to your existing tranny. G50/xx 5 spd conversions are costly, are NOT close ratio, and may not benefit your application.

 

You should rebuild the tranny you have, shorten 2nd and 3rd, it worked wonders for me

Christian

 

The G50 mod costs upwards of $10K so it's one of the more expensive mods.

 

I looked into this option when my transmission fell apart in my modified 78 turbo. Patrick Motorsports sells a short bell housing G50 that goes into a 930 without cutting the chassis. Cost was about $8K for the box alone, plus I am guessing at least 1-3K for clutch/labor/etc. I don't think it is worth it relative to regearing the 4 speed box, which is probably the most cost effective mod. Especially when coupled with a shorter ring. I rebuilt my box to stock and am now facing a complete engine rebuild (ouch). I am not sure that the $10K+ for a 5 speed is worth it. If you want a better spread for the track, regear the 4 speed and invest the difference in engine mods, I say, but I am sure that the hardcore track guys on the site will chime in with their experience once their New Year's hangovers wear off...

 

I love my G50 in my 930 but I want one in my '84 3.2 carrera as well, but the cost and the work to do it...