When the gear selector is placed in the 2−position, the second coast
brake (B1) is applied by way of the manual valve. When the second
coast brake is applied, it holds the sun gear from rotating in either
direction. Power flow is the same with the selector in 2," as when the
selector is in D" because the second coast brake is parallel to the
second brake and No. 1 one−way clutch.
However, when the transmission is being driven by the wheels on
deceleration, the force from the output shaft is transmitted to the front
carrier, causing the front...