These ratios are the same as my 1963 commer camper van, and are
unfortunately quite neccessary when hauling along its standard weight of
4000 lb. These vans were made up until the early 70s and marketed as dodges
in America I think.
I reckon this box is from a post 68 van, and someone has most likely retro
fitted the overdrive, (unless it was an option) The diff on my commer is a
5.6 (with 15 inch wheels), but with a tail wind blowing 55mph is definitely
"I wish I had an overdrive" territory.
Greg
----- Original Message -----
From: Jarrid Gross <JGross@econolite.com>
To: John Slade <edalsj@igs.net>; List, Alpine <alpines@autox.team.net>
Sent: Saturday, 26 May 2001 05:34
Subject: RE: Overdrive Gearboxes
> John Slade wrote,
>
> >I have recently obtained a Rootes overdrive gearbox whose origins I
> >can't identify. It is a later, full synchro box, with a casting number
> >71981060 (my late Alpine boxes all have the same number without the 7).
> >It has a fine spline on the input shaft, as compared to the coarse
> >spline on my Alpine boxes. The adapter (part # 1981083) for the D-type
> >overdrive is 3.75" long, with mounts, facing downward, cast into the
> >adapter about half way back. There are horizontal ribs which would
> >preclude a standard Alpine rear mount from being fitted. The gear ratios
> >(shown approximately) are weird...1st 4.15; 2nd 2.3; 3rd 1.5; 4th 1;
> >Reverse 3.75.
> >
> >I would appreciate any info about this set-up. Thanks in advance.
> >
> >John Slade
>
> These ratios are hiddious, you sure they are correct?
>
> I can see that some rootes cars might have a wider ratio than
> our beloved alpines, but these ratios seem unusably wide.
>
>
>
> Jarrid Gross
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