Question for the Tranny guru's

[Cory_Langford at bcit.ca (Cory Langford)]

   Thanks for the info, but I still have the question:

   If I swap in a 3.67 FD (I think the ff has a 3.94 doesn't it?) what will
   the results be?

   From a quick look at the calc. on the .org site, it looks like a higher
   top speed in each gear will be achieved.  This could be a good thing as
   the car will be sitting in the 5-6.5K range allot, and if I can get the
   revs down a little for the old 1.7 I think I will get more power out of
   it, etc.

   Just wondering what the down side might be...

   Cory Langford
   81 1.8S (for Supercharged)
   78 1.9L 8V Turbo
   86 2.1L 8V Turbo
   68 Ghia
   95 Eurovan

Ron Pieper <rapieper@yahoo.com> wrote on 12/01/2007 04:18:30 PM:

>
> --- Cory Langford <Cory_Langford@bcit.ca> wrote:
>
> > I need some opinions on building a tranny for the racer..
> >
> > Rules state that I can not modify the dif. external housing but that I
can
> > modify/change the dif.  So I figured a quaife would be in order.
> >
> > I have to keep the same gear ratios that were in the car when sold (so
that
> > means the FF trany set), but I am allowed to change the final drive.
> >
> > So what advantages/results would be had by changing the final drive on?
> > What final drives would be available?
>
> On...what?
> Your choices are 3.94 and 3.67, also 4.25 (relatively rare, from an
> AVX code box).  Any can be
> swapped - you'd need only the ring gear and pinion shaft.  Putting a
> 3.67 pinion shaft in an FF
> might require a later model 5th gear cover since most were longer to
> support an extra bearing
> housed in the cover.
> >
> > I have never torn apart a tranny so I am not even aware of what would
be
> > involved in changing the final drive (if done I would send it to a
> > reputable shop to do it).
>
> It's a full teardown.  I happen to know this guy who does them...  :)
>
> Is it even possible to take parts from say a 4y
> > or 9a and install them in the FF tranny to get the smaller final drive?
>
> Yes - decide what F/D is what you want and it can be swapped.
>
> HTH
>
> Ron
>
>
>
>
>
>
>
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