Planetary Gear Sets

The active gearbox contains three planetary gear sets, which likewise move in the transmission oil. The planetary gear sets serve to generate the various basic gears and states in the active gearbox.

Fig 1: Sectional View Of Active Gearbox With Highlighted Planetary Gear Sets

Courtesy of BMW OF NORTH AMERICA, INC.

ACTIVE GEARBOX WITH HIGHLIGHTED PLANETARY GEAR SETS EXPLANATION CHART

Index	Explanation
1	Planetary gear set 1
2	Planetary gear set 2
3	Planetary gear set 3