M6CF3-1 (6 Speed)

The M6CF3-1 is a Hyundai Motor Group six-speed manual gearbox (transaxle), fitted to 1.6-litre Hyundai and Kia models from around 2011. It's best known for worn synchromesh that makes the upper gears crunch on the change. For it, Eco Torque stocks an uprated synchromesh repair kit, genuine gearbox oil seals, the concentric clutch slave cylinder, and the correct manual gearbox oil.

New to the crunch problem? Read our Kia & Hyundai 6-Speed Gearbox Crunch guide — the common fault is a grinding or graunching noise when selecting gears, typically affecting 3rd through 6th. Or browse the matching M6CF3-1 gearbox oil. Not sure which parts you need? Send us your registration or VIN and we'll help.

Fits: Hyundai Accent, Elantra, i20, i30, i40, ix20, ix35, Kona, Tucson, Veloster · Kia Carens, cee'd, Pro cee'd, Cerato, Rio, Soul, Sportage, Stonic, Venga, XCeed