I believe that all Series III's (OD and non-OD) had 3.89 rear ends. If it was good enough for the factory to use, it should work well on your Series II. Tom
------------------------------
Date: 2/14/00 11:36 PM
To: Wiencek, Thomas
From: & Laila, Louis
Brent,
All O/D cars came originally with 4.22 rear ends. All non- overdrive
series 2 came with 3.89 rear ends. All series 5 non-od came with 3.89 EXCEPT
the first 8-9 thousand cars that came with 4.22s. The story I am told is
that they had an overrun of 4.22s and figured Americans would not know the
difference. To be sure, you need to check the serial number of your car and
find out the cutoff point. Secondly, you need to check the rear itself since
it may have been changed along the way. Lou
----- Original Message -----
From: "Brent Kasl" <kasl100(at)navix.net>
To: <AlpineDriver(at)AOL.COM>
Cc: <alpines(at)autox.team.net>
Sent: Tuesday, February 15, 2000 4:56 AM
Subject: Re: Od and Rearends
> Thanks all for the feedback-now I am confused. What is the stock rearend
gearing
> for a S2 and what is it for a stock S5? I am getting mixed up between the
> figures being thrown around. I have a S4-5 rearend in my S2 Alpine and
will be
> installing OD this Spring and I am still not sure what to expect based on
the
> numerous experiences. Thanks Brent
>
> AlpineDriver(at)aol.com wrote:
>
> > Steve, Brent and others:
> >
> > In the archives for September 1997 (maybe 98) there is an extensive
> > discussion of this issue which may be of interest. For many reasons
that
> > look right on paper several knowledgeable people on this list thought
the
> > 3.89 differential ratio was a bad idea with an overdrive. I remember
this
> > well since I had the winter before replaced my trashed 4.22 with a 3.89
and
> > thereafter had the good fortune to come upon an overdrive unit which I
had
> > not yet installed. I was afraid I had made a big mistake based on what
I was
> > reading ("...the car will be a slug...."). The concern basically was
> > burning out valves while lugging the engine at low rpm at medium speeds.
> >
> > Others I knew such as Tony Leeming had the 3.89 set up and just loved it
as
> > does Steve S. Well, I just have to say that it is a dream come true.
> > Driving to SUNI with the 3.89 and the OD was better than any highway
trip I
> > have ever had in an Alpine (and that includes Seattle to Baltimore and
back
> > in a nonOD Series IV years ago when I was young and foolish).
> > Rob Carpenter
> > Series V
> >
> > rootes(at)ix.netcom.com writes:
> > << Brent Kasl wrote:
> > > In a few weeks I will start the installtion of a rebuilt OD unit for
my
> > > S2. My rearend is a S5 installed way back in 1971. Is their going to
be
> > > a mismatch of driveability combined these two systems? I heard the
final
> > > gearing on this late rearend may perform differently with Overdrive.
Any
> > > ideas or firsthand experience? Thanks Brent
> >
> > Brent:
> > I converted my Series V to overdrive. It had a 4:22 rear with a stock 4
> > speed which was useless for highway driving (RPM's way too high). With
the
> > overdrive installed, I changed out the differential to a 3:9 unit and
it's
> > great. (Thanks to Tiger Tom for talking me into this setup). >>
> > Steve Sage
>
>
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