I have done the formula to order the correct speedometer gear for my car, but when I installed it, my speedometer says that I am doing 60, but my GPS says that I am doing 52. How may teeth different do I need to go to correct the situation?
The car has a 350 rear axle, and I am running 235 ? 60 x 15? tires/wheels. If i did the formula correct, I should have a 19 tooth gear. Based on this information, what gear (tooth count or color) should I have to get a correct reading? transmission is a C6 with a 7 tooth drive gear in the transmission.