Again, the overall first-gear ratio with the TH400 and 4.10:1 rear gear would be 10.168:1. But 10.168 / 4.70 (to determine the equivalent rear-gear ratio) equals 2.16:1, which is not realistic.

How to calculate gear ratios for improved performance Calculating gear ratios requires an understanding of the relationship between two gears: the input gear and the output gear. By adjusting the gear ...

How to choose the correct gear ratio for the rearend in your race car and match the final drive ratio to a racetrack and track conditions - Circle Track Magazine ...