Kitchen Machine Gearbox Assembly Complete If your gearbox assembly has become faulty and you are now finding it hard to use stop, and let eSpares help you. That will help get your kitchen machine back to its former glory leaving you able to create tasty food in no time at all once you have the gearbox assembly fitted. Genuine spare part for select models of Kenwood kitchen machines. Please check the list of suitable models to ensure that this spare part will fit your appliance.