 The Aisin AW six-speed automatic that was used on FWD Five Hundred and Montegos was also replaced by the GM-Ford 6-speed automatic transmission.The fourth-generation (4G) Ford Taurus was manufactured concurrently with a larger, new front-wheel drive sedan, the Ford Five Hundred and was discontinued in late 2006 for model year 2007.After discontinuation of the 4G Taurus, the Five Hundred, which did not perform to expectations, was rebranded as the 5G Taurus.