System Operation: Powerflow: Overview

With the selector lever in PARK, the low/reverse clutch holds the rear planetary carrier/center ring gear stationary.
The park pawl holds the rear ring/front planetary carrier stationary.
The turbine shaft drives the center sun gear.

With the selector lever in REVERSE, the low/reverse clutch holds the rear planetary carrier/center ring gear stationary.
The direct clutch drives the rear sun gear.
The rear ring/front planetary carrier transfers torque to the output hub in a reverse direction with a ratio of 2.88.

With the selector lever in NEUTRAL, the low/reverse clutch holds the rear planetary carrier/center ring gear stationary.
The turbine shaft drives the center sun gear.

In 1st gear, the forward clutch holds the front sun gear stationary.
The rear planetary carrier/center ring gear is held stationary by the low OWC and/or the low reverse (1, R) clutch.
The turbine shaft transfers torque to the center sun gear. The center sun gear transfers the torque to the center planetary carrier/front ring gear. The front ring gear transfers torque to the front planetary carrier/rear ring gear and the output hub to produce a ratio of 4.48.

In 2nd gear the forward clutch holds the front sun gear stationary.
The intermediate clutch holds the rear sun gear stationary.
The turbine shaft transfers torque to the center sun gear. The center sun gear transfers torque to the center ring gear/rear planetary carrier.
The rear planetary carrier transfers the torque to the rear ring gear/front planetary carrier and the output hub to produce a gear ratio of 2.87.

In 3rd gear the forward clutch holds the front sun gear stationary.
The direct clutch drives the rear sun gear.
Power flows from the center sun gear to the center planetary carrier/front ring gear. From there, torque is transferred to the rear ring gear/front planetary carrier.
Power also flows from the rear sun gear to the rear ring gear/front planetary carrier.
The two inputs to the front planetary carrier combine and transfer torque to the output hub to produce a gear ratio of 1.84.

In 4th gear the forward clutch holds the front sun gear stationary.
The overdrive clutch drives the rear planetary carrier/center ring gear.
Power flows from turbine shaft to the center sun gear and center ring gear.
The two inputs to the center planetary carrier combine and transfer torque to the front ring gear.
The front ring gear transfers the torque to the front planetary carrier and onto the output hub to produce a gear ratio of 1.41.

In 6th gear the overdrive clutch drives the rear planetary carrier/center ring gear.
The intermediate clutch holds the rear sun gear.
The torque from the rear planetary carrier is transferred to the rear ring gear/front planetary carrier and the output hub which produces a gear ratio of 0.74.