Richmond Gear 1304000069 Super T-10 4-Speed Transmission, GM 2.64

Richmond Gear's 1304000069 Super T-10 is a close-ratio 4-speed manual for GM applications, geared around a 2.64:1 first gear for quick acceleration when paired with numerically higher rear axle gears. Muncie and T-10 style shifters bolt to this case along with standard GM bellhousings, and the gearset rides on a 26-spline input shaft paired with a 32-spline output shaft.

Who a close-ratio first gear suits

A 2.64:1 first gear keeps the gap between first and second gear tighter than a wider-ratio transmission, which rewards a vehicle with a numerically higher rear axle gear and favors acceleration over the lowest possible RPM at highway speed. The aluminum case and synchronized forward gears keep weight down without giving up shift quality, and constant-mesh gearing in first and reverse adds to that durability.

Weight, fluid, and what is not included

Dry, this gearbox tips the scale around 70 lbs and calls for about 2.4 pints of GL-4 gear oil in the 80W-90 weight, running a 12-inch tailshaft at the back. None of the bellhousing, shifter, or slip yoke ship with the case, so line up GM-compatible versions of each, along with a 26-spline clutch disc, before starting the swap.

What warranty applies? Richmond Gear backs this transmission directly with a 1-year warranty against defects in material or workmanship.