Speedo gear help - The Supercar Registry

06-19-2022, 07:41 PM

drdave69 drdave69 is offline

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Speedo gear help

I finally got around to pulling my turbo 400 trans pan off to replace the kickdown solenoid. While I am working on it I decided to pull the speedo gear out since the speedo is off since the rear gears were changed. What I have researched is that I need a 24.38 tooth driven gear but I want to ask some experts.
I have a yellow drive gear in the trans with 11 teeth. The axle ratio is now 3.08 and the tires are 28 inches high (p235/70/15).
FYI, the speedo gear I pulled out is yellow with 34 teeth.

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Dave
1987 Grand National

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