Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 1844

7A1-38 CONSTRUCTION AND FUNCTION

P Range
Though the driving force of the input shaft is transmitted to the rear sun gear and reverse & high clutch drum,
the driving force is not transmitted to the output shaft since all of the clutches and brakes are not engaged.
Therefore, the vehicle can move at this condition. However, since the output shaft is mechanically locked
with the parking pawl, the rear planetary carrier and front internal gear are locked. For this reason, the
vehicle does not move.

CONSTRUCTION AND FUNCTION 7A1-39

N Range
Though the driving force of the input shaft is transmitted to the rear sun gear and reverse & high clutch drum,
the driving force is not transmitted to the output shaft, since all of the clutches and brakes are not engaged.
Therefore, the vehicle can move at this condition.

7A1-40 CONSTRUCTION AND FUNCTION

Reverse Gear in Range

The driving force from the input shaft is transmitted to the rear sun gear and reverse & high clutch drum. In the R
range, the reverse clutch is engaged and the driving force is transmitted to the front sun gear and rotates it
clockwise. The low & reverse brake is also engaged and the front planetary carrier is fixed so that the front pinion
gear does not rotate clockwise but can rotate counterclockwise. As a result, the output shaft rotates
counterclockwise and the vehicle goes back.

CONSTRUCTION AND FUNCTION 7A1-41

1st Gear in D, 3, 2 Range
The driving force from the input shaft is transmitted to the rear sun gear and reverse & high clutch drum.
Since the low clutch is engaged, the movement of the rear internal gear is restricted and, since the low one-
way clutch acts at the same time, counterclockwise rotations of the rear internal gear are locked. As a result,
the driving force transmitted to the rear sun gear rotates the rear planetary carrier clockwise, is decreased in
speed and transmitted to the output shaft.
When decelerating, since the rotating speed of the rear planetary carrier (rear pinion gear) is higher than that
of the rear sun gear and therefore, the rear internal gear attempts to rotate clockwise. At this time, the low
one-way clutch does not act but races and therefore the rear internal gear rotates clockwise. That is, the
reverse torque from the driving shaft is not transmitted to the engine side and therefore, the engine brake
does not act.