It's harder for a manufacturer to implement an effective stability control system in a manual. The federal mandate of safety features after the Explorer/Firesto

It's harder for a manufacturer to implement an effective stability control system in a manual. The federal mandate of safety features after the Explorer/Firestone problems included that all cars have stability control and TPS. The tire systems are easy, but stability control usually combines ABS with engine cutoff. In order for engine cutoff to work, the transmission must be engaged. This is also why automatics stay in gear when you're going downhill They call a feature "Downhill Assist" where the car attempts to maintain a stable speed relative to the pressure on the accelerator pedal. Combined with uphill assist, this makes for a more consistent driving experience.