1st GEAR IN D RANGE

WARNING: This page is about a different variant/trim than selected.

Forward brake operates to fix the mid sun gear.
1st one-way clutch operates to restrain reverse rotation of rear sun gear.
3rd one-way clutch operates to restrain reverse rotation of front sun gear.
During deceleration, because the rear sun gear rotates in normal direction, 1st one-way clutch slips and engine brake does not work.

Fig 1: Power Flow Diagram (1st Gear In D Range)

Courtesy of SUBARU OF AMERICA, INC.