Planetary Geartrain
GEARTRAIN-PLANETARYDESCRIPTION
The planetary geartrain is located behind the 4C retainer/bulkhead, toward the rear of the transmission. The planetary geartrain consists of three primary assemblies:
Reaction Planetary Geartrain:
- Reaction (3, 4, 8).
Reverse/Input Planetary Geartrain:
- Reverse (7).
- Input (4, 5, 6).
OPERATION
REACTION PLANETARY GEARTRAIN
The reaction planetary carrier and reverse sun gear of the reaction planetary geartrain are a single component which is held by the 2C clutch when required. The reaction annulus gear is a stand alone component that can be driven by the reverse clutch or held by the 4C clutch. The reaction sun gear is driven by the overdrive clutch.
REVERSE PLANETARY GEARTRAIN
The reverse planetary geartrain is the middle of the three planetary sets. The reverse planetary carrier can be driven by the overdrive clutch as required. The reverse planetary carrier is also splined to the input annulus gear, which can be held by the low/reverse clutch. The reverse planetary annulus, input planetary carrier, and output shaft are all one piece.
INPUT PLANETARY GEARTRAIN
The input sun gear of the input planetary geartrain is driven by the underdrive clutch.