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Speedometer Correction...

1103 Views 6 Replies 4 Participants Last post by  Don Roberts, 
Don Roberts
I'm trying to find information on the correct speedometer gear to use in the tailshaft housing on the turbo 350 trans in my Nomad.

There is a 3.36 gear in the rear, and the rear tire is 225 75 15.

Something to do with rear end ratio and tire circumference I'm sure, I just don't know what it is.

At 75 mph on the Nomad speedo the car is running along at 60 mph.

Always a lot of helpful information here and I appreciate it.

Thank you,

Don Roberts
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acardon
Here is another site with a calculator and the gear colors. ...http://www.tciauto.com/Products/TechInfo/speedo_gears.asp
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