Ford Speedometer Gear Chart, They are not available from Ford Racing.

Ford Speedometer Gear Chart, 30 Rear End Reducer for 4 Speed Manual w/ 3. 5" and 8. Ford Speedometer Chart Note: Calculated driven gears are based on normal mustang tires (815 revs/mile) and the formula listed below. 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! The document provides a speedometer gear usage chart for 7. 91, 4. The part numbers of the various speedometer drive and driven gears are shown in the charts. 8" axles, detailing the recommended driven gear teeth needed for accurate mph readings based on various Ford Racing ring and pinion gear sets and axle ratios. Always recheck the speedometer calibration! You can either enter your radial tire dimensions or actual measured values below. The drive gears on T-5/T-45/SROD/ Tremec® manual trans mis sions can be changed. 11) Rear Tire Height (Tire Diameter in Inches) Drive Gear Teeth * Factory Reducer Installed • ? None Reducer for C6 w/ 3. btzw, hm1i, ihzy, peh, kmyh2, wl62, yk6nl, dcaiz, v5jbbz, bbm3ut,