On show for the first time in the UK is a new 6-speed automatic transmission for rear wheel drive cars. The new unit, known as the ZF 6HP-32, is the latest in a growing range of 6-speed automatic transmissions from ZF that are setting the benchmark in automatic applications. The key benefits of having a sixth gear are greater fuel economy, which comes from the extra 'long' ratio, and a quieter, smoother ride. The lower gears can also be adjusted to give greater, initial acceleration.