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Discussion Starter #1
OK, my speedo is off from 15mph to 35 MPH and its beginning to irk the crap out of me

I have a M-20, a 373 gear, 15" rear tires., ands my trans has some sort of adapter box off the speedo hookup

Whats the best way to figure out what color speedo gear to put in, to get my speedo working correctly, When Im doing 70 actual, my speedo says Im doing 44mph and it goes from 15 off at the low end, to when Im doing 100 my speedo says 74 or so

Any formula or rhyme or reason to this?

thanx in advance guys

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