With the introduction of the F2T engine, the high torque (over 260nm) demanded the development of the H-Series transmission. A 5MT unit which is basically a larger version of the G-Series units. Featuring larger center distance, gears and casing, 3rd gear and differential are still an issue in modified vehicles with higher than standard horsepower and torque. Due to the very small production run of these vehicles, the H-Series transmissions are becoming much more difficult to find 2nd hand and in junkyards with new parts also becoming rare.
Available off the shelf is a helical cut single cone synchromesh engagement gear set for 3rd gear with a ratio of 1.25 which is a direct replacement for the factory OEM gear which most often fails.