Question for the Tranny guru's

[rapieper at yahoo.com (Ron Pieper)]

Go get my spreadsheet here: http://scirocco.dhs.org/cheapassron/020tranny/trannyratios.xls

And key in the values for whatever tranny you want, and view the graph...

HTH

Ron

--- Cory Langford <Cory_Langford@bcit.ca> wrote:

> 
> 
> 
> 
> 
>    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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> 
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