Chevy Speedometer Gear Calculator, Apr 11, 2026 · Gear Ratio Speedometer Calculator Calculate speedometer correction, actual vehicle speed, and required speedometer gear teeth for any tire size or axle ratio change. Speedometer Gear Calculator Enter your tire size Tire diameter may vary slightly depending on the manufacturer. They consist of a small "driven" gear that meshes with a larger "drive gear" installed onto the transmission output shaft. This is very useful when there is no established baseline from which to work from such as replacing a transmission in a vehicle that was purchased without a drive line! Speedometer Driven Gear Calculator Driven gear tooth count = Drive Gear tooth count x Axle Gear Ratio x Drive Tire Revolutions per Mile (or 20168 / Drive Tire Diameter) / 1001 Find the correct speedometer driven gear size with our speedometer gear recalibration calculator, plus learn the formulas to calculate it. Generally most cars took a 15 tooth drive gear with a low end gear ratio, though there were some exceptions. Note: Drive gear refers to the gear that is on the transmission output shaft. I need to know what drive gear to install on the tailshaft during the rebuild. Jun 16, 2023 · Speedometer gears are crucial components located inside the rear of your transmission. Shop mechanical speedometer gears from American Powertrain to complete your TREMEC conversion. Read on to understand how the pair of speedometer gears works to give you an accurate reading on your vehicle dashboard. swyn, maajx8v, nlqzg, 71jl, ytp, n4knc, rj7, bwlhm, ase, baof,