okay guys i want to know my mph's the upgraded gears i have (3.73's) still using the aod's speedo/tranny gear is really really off! i know i can get another tranny gear but their isnt one for the 3.73's that is dead on. so i was thinking is there any other way to get a accurate reading...i have seen and was thinkg about a bicycle speedometer that i could install on the wheel