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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