| Re: [GMCnet] Speedometer Gear Combinations [message #316713 is a reply to message #316712] |
Thu, 27 April 2017 16:15   |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
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Senior Member |
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I have been running one of them for a long time (years) with two cross
country trips included. I run Doug Thorley Headers on a 403 Olds with a
heavy 78 Royale Coach frequently pulling a trailer. No problems yet with
the gearbox. I am not sure that you can get the exact gear any longer that
will be spot on with only one gear changed if you go into the transmission.
But, Jim K can tell you for sure, and he has a toll free phone number. All
it will cost you is your time. If you are running headers and they are not
the Manny T ones, you will have to pull the headers on that side of the
engine to pull the governor. But, it is your time and money, and this is
America, land of the Free Choices.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Thu, Apr 27, 2017 at 2:05 PM, John Watkins wrote:
> I know that option is available, but it isn't a big job to pull the
> governor and replace the speedometer drive gear. Also, that little reducer
> is
> likely to get cooked by the heat of the headers.
>
>
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