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Home >> Chevrolet >> 2015 >> Spark LS, Standard Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - AISIN 80-40LE >> Description and Operation >> Transmission Component and System Description >> Control Functions of the TCM >> Neutral Control

Neutral Control

By disengaging the lock-up clutch when the vehicle is stationary and the shift lever is in the drive (D) position, the transmission effectively changes to neutral, reducing torque converter drag losses. This reduces engine load and vibration at idle and enhances fuel economy. If the brake pedal is then released, normal creep force will be generated, enabling smooth starting OFF.