Jarrid, the non OD cable can be made to fit but it is a bit too short and I had
to put in the longer OD cable to increase the radius.
Rob.. the real answer is to repace the speedo drive ratios on the tail shaft of
your OD gearbox if you can't find a series III speedo. This is a bit of a pain
to do. I have seen a gear reduction gismo similar to what Dick talks about and I
believe someone on the net posted the name of a place that will supply them.
Other than that, tell yourself you are driving in KMH !! it's close enough...
Tony
"Jarrid Gross (Yorba Linda, CA)" wrote:
> ----------
> From: RobCarpent(at)aol.com
>
> >I don't know but I may need to change the speedo head and or the gear in an
> >overdrive transmission to get an accurately indicated speed on the
> >speedometer.
>
> There is a different rootes part number for OD speedos vs std speedos.
> I would assume that there is a different odometer drive gearset inside,
> and the spring tension a little different.
>
> >Does the differential ratio matter? If it does mine is 3.89 [please no
> slug
> >jokes from those who recall the spirited discussion on this list from Sept
> 97
> >on the proper ratio with an OD].
>
> Yes, differential ratio does matter, since all OD alpines except SIII came
> with
> 4.22 rear ends, his could be the difference between the non OD and
> OD speedos. If this is the case, you would use the speedo that goes
> with the cars stock rear end.
>
> Oh, and someone once told me that the speedo cable drive assembly
> is the same parts on std trannys as well as OD trannys, they just mount
> in different places. Can anyone confirm?
>
> Jarrid Gross
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