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Planetary gear set, location/task/design/function - GF27.50-P-5100NN: Notes

TRANSMISSION 722.9 in MODEL 171.4, 203, 209, 211, 215, 219, 220, 230 Single planetary gear set 

TRANSMISSION 722.9 in MODEL 463.303 /340 /341 

Fig 1: Identifying Single Planetary Gear Set - Transmission 722.9
G04732607Courtesy of MERCEDES-BENZ USA
  Planetary gear set, location The front single planetary gear set (12a) and the rear single planetary gear set (12b) are located in the mechanical part of the transmission.  
  Planetary gear set, task Power transmission and production of different gear ratios.  
  Planetary gear set, design A single planetary gear system consists of a ring gear, the planetary gears mounted in the planet carrier and a sun gear  
  Planetary gear set, function   GF27.50-P-5100-01NN