Design concept:
The factory Ford Motorsport T5 .80 overdrive set used a gearset with a tooth combination of 33 teeth upper and 53 teeth lower. By creating a new set with less teeth and a .100" larger diameter upper gear, realized strength improves greatly. This will yield a .80 Overdrive ratio with a 2.95 1st gear T5 World Class transmission. It is designed to fit a 28 spline mainshaft The new tooth combination of 20 teeth upper and 32 teeth lower yields virtually the same exact gear ratio making it very desirable for road race use.