Nissan Frontier D22. Manual - part 51

OVERALL SYSTEM

AT-173

[RE4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

D

2

 ,  2

2

  and 1

2

  Positions

SAT097J

Forward clutch
Forward one-way clutch
Brake band

Rear sun gear drives rear planetary carrier and combined front internal gear. Front internal 
gear now rotates around front sun gear accompanying front planetary carrier.
As front planetary carrier transfers the power to rear internal gear through forward clutch and 
forward one-way clutch, this rotation of rear internal gear increases the speed of rear plane-
tary carrier compared with that of the 1st speed.

Overrun clutch
engagement conditions

D

2

 : Overdrive control switch in OFF

Throttle opening less than 3/16

2

2

 : Throttle opening less than 3/16

1

2

 : Always engaged

AT-174

[RE4R01A]

OVERALL SYSTEM

D

3

  Position

SAT098J

High clutch
Forward clutch
Forward one-way clutch

Input power is transmitted to front planetary carrier through high clutch. And front planetary 
carrier is connected to rear internal gear by operation of forward clutch and forward one-way 
clutch.
This rear internal gear rotation and another input (the rear sun gear) accompany rear plane-
tary carrier to turn at the same speed.

Overrun clutch
engagement conditions

D

3

 : Overdrive control switch in OFF

Throttle opening less than 3/16

OVERALL SYSTEM

AT-175

[RE4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

D

4

  (O/D) Position

SAT099J

High clutch
Brake band
Forward clutch
(Does not affect power transmission)

Input power is transmitted to front carrier through high clutch.
This front planetary carrier turns around the sun gear which is fixed by brake band and 
makes front internal gear (output) turn faster.

Engine brake

At D

4

  position, there is no one-way clutch in the power transmission line and engine brake 

can be obtained when decelerating.

AT-176

[RE4R01A]

OVERALL SYSTEM

R Position

SAT101J

Reverse clutch
Low and reverse brake

Front planetary carrier is stationary because of the operation of low and reverse brake.
Input power is transmitted to front sun gear through reverse clutch, which drives front inter-
nal gear in the opposite direction.

Engine brake

As there is no one-way clutch in the power transmission line, engine brake can be obtained 
when decelerating.