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Speed sensor - Function - GF27.19-P-5127-02P

Transmission 722.9 in model 171.4, 203, 209, 211, 215, 219, 220, 230, 463.303/340/341 internal speed sensor 

Fig 1: Identifying Speed Sensors
G07287855Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The internal speed sensor (VGS) (Y3/8n2) records the internal transmission speed at the ring gear of the front single planetary gear system for the fully integrated transmission control (VGS).

Together with the information from the turbine speed sensor (VGS) (Y3/8n1) and from the output speed sensor (VGS) (Y3/8n3) this RPM is processed as an input signal by the fully integrated transmission control unit (VGS) (Y3/8n4). This contributes to shortening the reaction time during shift operations.