Guys,
I am having difficult getting my speedometer to read anywhere close to actual speed. It’s reading about 20-25% under the actual speed. I know my differential ratio as it is newly rebuilt (all new) and I know my tire size. I used the online calculators and it told me to buy a pink tooth gear (19 tooth). What am I missing? With 3.50 ratio differential, 4 speed, and 235 60 15 tires.