Hi Derek,
Just this month issue of the Dutch MG Car Club magazine this has been
discussed in a very nice article. Give me a call and visit me in my
Amsterdam office in order to see and copy this.
I assume you should be able to read Dutch by now.
Cheers,
Hans
'71 BGT
----- Original Message -----
From: "Derek Vandivere" <derek@vandivere.net>
To: <mgs@Autox.Team.Net>
Sent: Monday, November 22, 2004 4:49 PM
Subject: Speedo reads low after overdrive conversion
> So my mechanic, about a year ago, converted my 78 B to overdrive.
> Hooray! I now have two problems with it: the speedo is now very jerky,
> tending to settle down a bit more at speed (around 20 mph, it jerks
> between 0 and 40, but only oscillates by 10 mph or so at 70 mph).
> Second, it consistently reads about 10 mph (maybe 10%, actually) lower
> than my actual speed (as measured with a GPS).
>
> For the first problem, do I correctly remember that powdered graphite
> is a good lubricant for the cable? Funnily enough, Dad still had the
> tube left over from a Pinewood Derby, so I'm set there.
>
> For the second problem, my best guess is that the OD has the wrong
> speedo pinion on it (Moss parts 462-610 or 462-615 for OD, but I
> suspect he may have just left the original non-OD pinion on, if that's
> possible). Would that be at all consistent with reading low all the
> time? And am I correct in thinking that which pinion you use depends
> on the marking of the OD unit itself?
>
> (or should I just give up and go back to my mechanic and tell him it
> just don't work and he should fix it? it's been a bit of a saga with
> this speedo...)
>
> Thanks,
> Derek (78 B in Amsterdam, and now a 2002 Saab 93 diesel for the commute)
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