Self-Study Program

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Primary planetary gear set
Component: connected to:
H1 – Ring gear 1 Turbine shaft (drive)/clutch K2
P1 – Planetary gears 1 Power transmission in planetary gear set
S1 – Sun gear 1 Stationary
PT1 – Planet carrier 1 Clutches K1 and K3
Secondary planetary gear set
Component: connected to:
H2 – Ring gear 2 Output
P2 – Planetary gears 2, long Power transmission in planetary gear set
P3 – Planetary gears 3, short Power transmission in planetary gear set
S2 – Sun gear 2, large Clutch K3/brake B1
S3 – Sun gear 3, small Clutch K1
PT2 – Planet carrier 2 Clutch K2/brake B2/freewheel F
Clutches, brakes, freewheel
Component: connects or task:
K1 – Clutch 1 Planet carrier PT1 (primary gear set) connected to small sun gear S3
(secondary gear set)
K2 – Clutch 2 Turbine shaft (input) connected to planet carrier PT2 of the
secondary planetary gear set
K3 – Clutch 3 Planet carrier PT1 (primary gear set) connected to small sun gear S2
(secondary gear set)
B1 – Brake 1 Holds the large sun gear S2 (secondary gear set) stationary
B2 – Brake 2 Holds planet carrier PT2 (secondary gear set) stationary
F – Freewheel holds the planet carrier PT2 (secondary gear set) stationary
counter to the direction of rotation of the drive
Used when driving under throttle in 1st gear (no engine brake).
Converter lockup clutch
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