For engines with a front gear train.
Pinions have 23/24 Helix Teeth.

For engines with CPL#s 591, 599, 714, 721, 742, 831, 1279, 1288 ,1519, 1522, 1523, 1524, 1551, 1816, 1889, 1914, 1948, 1961, 1962, 1975, 2014, 2063, 2071, 2122, 2205, 2208, 2242, 2243, 2292, 2347, 2372, 2373, 2446, 2447, 2486, 2530, 2686, 2891, 2893, 8208, 8217, 8236, 8266, 8267, 8304, 8305, 8306, 8444

For engines with a front gear train.
Pinions have 22/24 Straight Teeth.

For engines with CPL#s 0742, 8206