Nissan Versa Sedan. Instruction — part 792

TM-74

< SYSTEM DESCRIPTION >

[4AT: RE4F03C]

STRUCTURE AND OPERATION

• The drive force from the input shaft is transmitted via the engaged low clutch and turns the rear sun gear for-

wards. This causes the rear internal gear to turn backwards, however it is stopped by the one-way clutch.

The rear gear turns forward and the force is transmitted to the output gear after being slowed down.

NOTE:

When coasting, because the front carrier is able to turn forward, engine braking does not occur.

• The status of each planetary gear is as shown below.

Front planetary gear

Rear planetary gear

“1” position, “D

1

” position, engine brake

• The drive force from the input shaft is transmitted via the engaged low clutch and turns the rear sun gear for-

wards. This causes the rear internal gear to turn backwards, however it is stopped by the one-way clutch.

The rear carrier turns forward and the force is transmitted to the output gear after being slowed down.

• The status of each planetary gear is as shown below.

Front planetary gear

Name

Front sun gear

Front carrier

Front internal gear

Condition

—

Fixed

—

Rotating direction

Reverse

Stopped

Forward

Speed

—

—

—

Name

Rear sun gear

Rear carrier

Rear internal gear

Condition

Input

Output

Fixed

Rotating direction

Forward

Forward

Stopped

Speed

Same speed as input shaft

Slower than rear sun gear

—

JSDIA1995GB

Name

Front sun gear

Front carrier

Front internal gear

Condition

—

Fixed

—

Rotating direction

Reverse

Stopped

Forward

Speed

—

—

—

STRUCTURE AND OPERATION

TM-75

< SYSTEM DESCRIPTION >

[4AT: RE4F03C]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Rear planetary gear

“2” position, “D

2

” position

• In 1st gear, the front sun gear is turning in reverse. However the 2-4 brake operates and fixes the front sun

gear in place. When this happens, the front carrier turns in the forward direction. As a result, when the front

internal gear transmits force to the output gear, it turns forward at a faster speed than when in 1st gear.

• Because the rear internal gear and front carrier are turning forward, the one-way clutch turns freely.

• The status of each planetary gear is as shown below.

Front planetary gear

Rear planetary gear

“D

3

” position

Name

Rear sun gear

Rear carrier

Rear internal gear

Condition

Input

Output

Fixed

Rotating direction

Forward

Forward

Stopped

Speed

Same speed as input shaft

Slower than rear sun gear

—

JSDIA1996GB

Name

Front sun gear

Front carrier

Front internal gear

Condition

Fixed

Output

Input

Rotating direction

Stopped

Forward

Forward

Speed

—

Slower than front internal gear

Same speed as rear carrier

Name

Rear sun gear

Rear carrier

Rear internal gear

Condition

Input

Output

Input

Rotating direction

Forward

Forward

Forward

Speed

Same speed as input shaft

Slower than rear sun gear

Slower than rear carrier

TM-76

< SYSTEM DESCRIPTION >

[4AT: RE4F03C]

STRUCTURE AND OPERATION

• The low clutch and high clutch that are connected to the input shaft are engaged, creating a single power

transmitting mechanism and rotating while engaged.

• The status of each planetary gear is as shown below.

Front planetary gear

Rear planetary gear

“D

4

” position

JSDIA1997GB

Name

Front sun gear

Front carrier

Front internal gear

Condition

—

Input

—

Rotating direction

Forward

Forward

Forward

Speed

Same speed as input shaft

Same speed as input shaft

Same speed as input shaft

Name

Rear sun gear

Rear carrier

Rear internal gear

Condition

Input

Output

—

Rotating direction

Forward

Forward

Forward

Speed

Same speed as input shaft

Same speed as input shaft

Same speed as input shaft

STRUCTURE AND OPERATION

TM-77

< SYSTEM DESCRIPTION >

[4AT: RE4F03C]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

• The drive force input from the input shaft is transmitted by forward rotation of the engaged high clutch to the

front carrier. Operation of the 2-4 brake fastens the front sun gear in place, causing the front carrier to turn

forward. As a result, the front internal gear turns faster, the rear carrier turns forward, and force is transmit-

ted to the output gear.

• The status of each planetary gear is as shown below.

Front planetary gear

Rear planetary gear

“R” position

JSDIA1998GB

Name

Front sun gear

Front carrier

Front internal gear

Condition

Fixed

Input

Output

Rotating direction

Stopped

Forward

Forward

Speed

—

Same speed as input shaft

Faster than front carrier

Name

Rear sun gear

Rear carrier

Rear internal gear

Condition

—

Output

Input

Rotating direction

Forward

Forward

Forward

Speed

Faster than input shaft

Faster than input shaft

Same speed as input shaft