I have a 1978 Scout 2 with an inaccurate speedometer. The inaccuracy is due to changed rear end gears and 33 inch tires. The PO did the rear end gear swap, 3.55 I think? The scout has a 345, torque flight, and dana 20. Anyway, the speedometer reads slow. When the Scout speedo reads 15 the GPS says I am going 23 When the Scout speedo reads 25 the GPS says I am going 35 When the Scout speedo reads 35 the GPS says I am going 47 I pulled the driven gear from the t-case. It is all metal and has 13 teeth. Based on the research I have done, I need a driven gear with fewer teeth to speed up the speedo cable rotation and thus increase the indicated speed on the dash. These gears seem to be getting rare as there are few for sale and those I do find have more not fewer teeth. Has anyone found a source for these gears? Do they come with 11 or 12 teeth? If not, what other options are available without doing math in my head each time I check the gauge.