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Message: <blockquote data-quote="nyuk98gt" data-source="post: 359447" data-attributes="member: 8810">Guys: For the record, there is no gear alone that will fix the speedo. The best option is to leave the stock gear in (orange, 19 teeth IIRC) and use a SpeedCal or Abbott ERA calibrator. FWIW, I have had a SpeedCal installed for many years and my speedo/odo is dead-on accurate. It is a good little device and well worth the $100. Installation is pretty easy and the instructions are great with lots of pictures for reference. +1 for asking your mech/tech what he installed. If he used the "white gear" (21 or 23 teeth - sorry, can't remember the exact number) then it will be in the ballpark but it will still read more speed/miles than actual (so, more than 1 mile for every real mile travelled). The teeth are very thin and they will fail in time. The bottom line is, why register more miles on your car than you are actually putting on the car? HTH, Chris</blockquote>