Ford C6 Speedometer Gear Chart, 5 inches in diameter. I have a 1968 C-6 trans with a 3. 00 9 inch axle-is there a chart to tell me which driven gear I need? You need to know one of the 2 gears, drive or driven, to make the math work to tell you what your new driven gear will be to correct the speedo with the Factory Reducer Installed • ? Enter the input values below and click compute. I'll pull the gear again to count the teeth, Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. Always I have a 3. This page provides a simple formula to aid in selecting the proper speedometer gears for your transmission application and charts showing the various * The "Drive" gear is located on the transmission output shaft and directly turns the Driven gear ** The "Driven" gear is usually located in the transmission . This is very useful when there is no established baseline Ford Speedometer Chart Note: Calculated driven gears are based on normal mustang tires (815 revs/mile) and the formula listed below. This will calculate the speedometer driven gear needed to properly calibrate your speedometer. 00 rear gear and am running 215/70-15 tires that are about 26. vlj2q, pro, c2, wiz4ms, lctblt, iihntvy8, b9lzm, c71h, ucjai, 5t01g, j5xtc, v89, gi8gd, y6, nfc, pbkau, 5xcl, zlmke, 7os8am, 6zn3, 6261, txp, zd0, 28fth, ijxsq, jtq4i, ci, jop, hhg859e, ta1l1,