Nissan Frontier D22. Instruction — part 50

OVERALL SYSTEM

AT-169

[RE4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

FUNCTION OF CLUTCH AND BRAKE

CLUTCH AND BAND CHART

●

*1: Operates when overdrive control switch is being 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 con-
tract 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 in OFF position.

●

*5: Operates when overdrive control switch is OFF.

●

: 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 components

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 against engine revolution.

Low one-way clutch 19

L/O.C

To stop front planetary carrier 11 from rotating in opposite direc-
tion against engine revolution.

Low & reverse brake 20

L & R/B

To lock front planetary carrier 11 .

Shift posi-

tion

Reverse

clutch

High

clutch

For-

ward

clutch

Over-

run

clutch

Band servo

For-

ward

one-

way

clutch

Low

one-

way

clutch

Low &
revers

e

brake

Lock-up

Remarks

2nd

apply

3rd

releas

e

4th

apply

P

PARK

POSITION

R

REVERSE
POSITION

N

NEUTRAL

POSITION

D*4

1st

*1D

B

B

Automatic

shift

1

⇔ 2 ⇔ 3

⇔ 4

2nd

*1A

B

3rd

*1A

*2C

C

B

*5

4th

C

*3C

C

2

1st

D

B

B

Automatic

shift

1

⇔ 2

2nd

A

B

1

1st

B

B

Locks

(held sta-

tionary) in
1st speed

1

⇐ 2

2nd

B

AT-170

[RE4R01A]

OVERALL SYSTEM

POWER TRANSMISSION
P and N Positions

●

P position
Similar to the N position, no control members operate. The parking pawl interconnected with the select
lever engages with the parking gear to mechanically hold the output shaft so that the power train is locked.

●

N position
No control members operate. Power from the input shaft is not transmitted to the output shaft since the
clutch does not operate.

SAT039J

OVERALL SYSTEM

AT-171

[RE4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

1

1

Position

SAT100J

Forward clutch
Forward one-way clutch
Overrun clutch
Low and reverse brake

As overrun clutch engages, rear internal gear is locked by the operation of low and reverse
brake.
This is different from that of D

1

and 2

1

.

Engine brake

Overrun clutch always engages, therefore engine brake can be obtained when decelerating.

AT-172

[RE4R01A]

OVERALL SYSTEM

D

1

and 2

1

Positions

SAT096J

Forward one-way clutch
Forward clutch
Low one-way clutch

Rear internal gear is locked to rotate counterclockwise because of the functioning of these
three clutches. (Start-up at D

1

)

Overrun clutch
engagement conditions
(Engine brake)

D

1

: Overdrive control switch in OFF

Throttle opening less than 3/16

2

1

: Throttle opening less than 3/16

At D

1

and 2

1

positions, engine brake is not activated due to free turning of low one-way

clutch.