Nissan Frontier D22. Manual - part 11

OVERALL SYSTEM

AT-13

[RL4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

Cross-sectional View

ECS007IO

LCIA0279E

AT-14

[RL4R01A]

OVERALL SYSTEM

Hydraulic Control Circuits

ECS007IP

WCIA0157E

OVERALL SYSTEM

AT-15

[RL4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

Shift Mechanism

ECS007IQ

The automatic transmission uses compact, dual planetary gear systems to improve power-transmission effi-
ciency, simplify construction and reduce weight.
It also employs an optimum shift control and superwide gear ratios to improve starting performance and accel-
eration during medium and high-speed operation.
Two one-way clutches are also employed: one is used for the forward clutch, and the other for the low clutch.
These one-way clutches, combined with four accumulators, reduce shifting shock to a minimum.

CONSTRUCTION

SAT026HA

AT-16

[RL4R01A]

OVERALL SYSTEM

FUNCTION OF CLUTCH AND BRAKE

CLUTCH AND BAND CHART

*1 : Operates when overdrive control switch is set in OFF position.
*2 : Oil pressure is applied to both 2nd “apply” side and 3rd “release” side of band servo piston. However, brake band does not contract
because oil pressure area on the “release” side is greater than that on the “apply” side.
*3 : Oil pressure is applied to 4th “apply” side in condition *2 above, and brake band contracts.
*4 : A/T will not shift to 4th when overdrive control switch is set to OFF position.

 : Operates.

A: Operates when throttle opening is less than 3/16, activating engine brake.
B: Operates during “progressive” acceleration.
C: Operates but does not affect power-transmission.
D: Operates when throttle opening is less than 3/16, but does not affect engine brake.

Clutch and brake compo-

nents

Abbr.

Function

Reverse clutch 6

R/C

To transmit input power to front sun gear 9 .

High clutch 7

H/C

To transmit input power to front planetary carrier 11 .

Forward clutch 16

F/C

To connect front planetary carrier 11  with forward one-way clutch 17 .

Overrun clutch 18

O/C

To connect front planetary carrier 11  with rear internal gear 14 .

Brake band 5

B/B

To lock front sun gear 9 .

Forward one-way clutch 17

F/O.C

When forward clutch 16  is engaged, to stop rear internal gear 14  from rotating in 
opposite direction.

Low one-way clutch 19

L/O.C

At D

1

  position, to prevent rear internal gear 14  from rotating in opposite direction.

Low & reverse brake 20

L & R/B

To lock rear internal gear 14  (2, 1

2  

  and 1

1

 ), to lock front planetary carrier 11  (R posi-

tion).

Shift posi-

tion

Reverse 

clutch 6

High 

clutch 

7

For-

ward 

clutch 

16

Over-

run 

clutch 

18

Band servo

For-

ward 

one-

way 

clutch 

17

Low 

one-

way 

clutch 

19

Low & 
revers

e 

brake 

20

Lock-up

Remarks

2nd 

apply

3rd 

releas

e

4th 

apply

P

PARK 
POSI-
TION

R

REVERS
E POSI-
TION

N

NEU-
TRAL 
POSI-
TION

D *4

1st

D

B

B

Automatic 
shift
1 

←→ 2 

←→ 3 

←→ 4

2nd

*1A

B

3rd

A

*2C

C

B

4th

C

*3C

C

2

1st

D

B

B

Automatic 
shift
1 

←→ 2

2nd

B

1

1st

B

Locks 
(held sta-
tionary) in 
1st speed 
1 

← 2

2nd

B