Help! 1941 120 Differential Ratio

Posted by Pat Brothers On 2010/7/17 20:02:31

Hi All:

I need to find out what the standard differential ratio is for our '41 120 coupe.

I think an OD car was 4.09, but the non-OD car is what I need. We are heading across country to run the Hemming's Challenge in Bowling Green, KY. All my reference info is home in Oregon. The car is in Chattanooga.

We are getting new shoes for her, and I need to recalc our rally speedo settings. This is a time-speed-endurance rally and is calculated to 1/100 second. I need to "rough" calc the speedo settings so we can then adjust for heat, altitude, and tire pressure.

Thanks for your help!

Pat

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