Planetary Gearset (Ravigneaux): Notes

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Based on the Ravigneaux design, the A5S 360R planetary gearset is made up of two sections; front & rear. It functions as a single integral assembly with a common planetary carrier and a set of common long planetary gears. See Fig 1 . It consists of the following components:

Two separate ring gears.
Two separate input sun gears (one front, one rear).
One set of three long planetary gears common to both sections (front-rear).
One set of three short planetary gears (rear).
One set of three short planetary gears (front).
One common planetary carrier. See Fig 2 and Fig 3 .

Fig 1: Identifying Planetary Gearset "Input-Reaction-Output" Chart
Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Identifying Planetary Gearset (1 Of 2)
Courtesy of BMW OF NORTH AMERICA, INC.

Fig 3: Identifying Planetary Gearset (2 Of 2)
Courtesy of BMW OF NORTH AMERICA, INC.