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Re: overdrive speedometer

To: mgs@Autox.Team.Net
Subject: Re: overdrive speedometer
From: "A. B. Bonds" <ab@vuse.vanderbilt.edu>
Date: 12 Feb 1997 10:27:51 -0600
In <s3019fd4.018@holycross.edu>, Kenneth Scott wrote:
>I have a 1977 MGB roadster which I purchased without an overdrive. 
>I lucked out and got an overdrive&tranny for $325.  Installed it and
>it worked fine.  Speedometer is right on.  My question is:  Why do I
>see references to changing speedometers when switching to overdrive 
>unit?  If you fit an overdrive unit of the same vintage as the
>vehicle shouldn't the speedometer be OK?  Was I just lucky?
>Inquiring minds want to know!
>
>From 1974 1/2 on the drive gear and speedo ratios were changed so as
to be identical for both non-OD and OD cars.  Parts rationalization--I
love it! And it only took 11 years!

                                A. B. Bonds




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