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Re: Speedo calibration

To: MG List <>
Subject: Re: Speedo calibration
From: Max Heim <>
Date: Thu, 06 Sep 2001 10:11:22 -0700
The OD transmission may require a different speedometer for correct
calibration. Or possibly just a different drive pinion. There is at least
one web site with a discussion of the various combinations.

Try <> and look for Speedometers.

on 9/6/01 6:47 AM, mghirsch at wrote:

> I just installed an OD trans in my 78B.  Before the conversion, the speedo
> needle jumped and never gave an accurate reading.  As this is a typical
> sympton of a bad cable, I never did anything about it until I installed the
> new trans, since, I needed to install a new, longer cable.
> Now the speedo gives accurate readings at 45 mph or below (18miles/1000rpm in
> fourth, and 22 miles/1000 rpm in 4th with the OD in) but at higher speeds the
> speedo reads low.  The faster I go, the greater the difference.  Does anyone
> know how to calibrate the speedo?
> Maynard Hirsch
> 78B
> 67B
> 86XJ6


Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.

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