A golf cart rear axle, often referred to a Differential or Transaxle, helps propel your Yamaha G1, G2, G3, G5, G8, G9, G11, G14, G16, G19, G22, and G29 the drive gas or electric golf cart. A differential slows the rotational speed of your clutch or electric motor before it hits the rear wheels. Most Yamaha rear axles include hubs.