Nissan Sentra. Manual - part 862

TM-84

< SYSTEM DESCRIPTION >

[CVT: RE0F11A]

COMPONENT PARTS

3.

Shift lock release button

Forcibly releases the shift lock when pressed.

4.

Stop lamp switch

• The stop lamp switch turns ON when the brake pedal is depressed.
• When the stop lamp switch turns ON, the shift lock solenoid is energized.

No.

Component

Function

STRUCTURE AND OPERATION

TM-85

< SYSTEM DESCRIPTION >

[CVT: RE0F11A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

STRUCTURE AND OPERATION

TRANSAXLE
TRANSAXLE : Cross-Sectional View

INFOID:0000000009759337

Converter housing 

Oil pump

Counter drive gear

Control valve

Oil pan

Primary pulley 

Steel belt

Secondary pulley

Planetary gear (auxiliary gearbox) 

Side cover

Transaxle case

Differential case

Final gear

Reduction gear

Counter driven gear

Drive sprocket 

Oil pump chain 

Torque converter

Driven sprocket

JSDIA1777ZZ

TM-86

< SYSTEM DESCRIPTION >

[CVT: RE0F11A]

STRUCTURE AND OPERATION

TRANSAXLE : Operation Status

INFOID:0000000009759338

×: Engaged or applied.

TRANSAXLE : Transaxle Mechanism

INFOID:0000000009759339

BELT & PULLEY

Mechanism

It is composed of a pair of pulleys (the groove width is changed freely in the axial direction) and the steel belt

(the steel plates are placed continuously and the belt is guided with the multilayer steel rings on both sides).

The groove width changes according to wrapping radius of steel belt and pulley from low status to overdrive

status continuously with non-step. It is controlled with the oil pressures of primary pulley and secondary pulley.

Steel belt

It is composed of multiple steel plates   and two steel rings 

stacked to a several number. The feature of this steel belt transmits

power with compression of the steel plate in contrast with transmis-

sion of power in pulling with a rubber belt. Friction force is required

with the pulley slope to transmit power from the steel plate. The force

is generated with the following mechanism:

Oil pressure applies to the secondary pulley to nip the plate. 

⇒The

plate is pushed and extended outward. 

⇒The steel ring shows with-

stands. 

⇒Pulling force is generated on the steel ring. ⇒The plate of

the primary pulley is nipped between the pulley. 

⇒Friction force is

generated between the steel belt and the pulley. 

Therefore, responsibilities are divided by the steel plate that trans-

mits the power with compression and the steel ring that maintains necessary friction force.   In this way, the

tension of the steel ring is distributed on the entire surface and stress variation is limited, resulting in good

durability. 

Pulley

Selector le-

ver posi-

tion

Parking 
mecha-

nism

Counter 
gear set 

Low brake  High clutch

Reverse 

brake 

Primary 

pulley 

Secondary 

pulley

Steel belt

Reduction 

gear set

P

×

×

×

×

×

R

×

×

×

×

×

×

N

×

×

×

×

D

×

× (1GR)

× (2GR)

×

×

×

×

L

×

× (1GR)

× (2GR)

×

×

×

×

JSDIA1966ZZ

STRUCTURE AND OPERATION

TM-87

< SYSTEM DESCRIPTION >

[CVT: RE0F11A]

C

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F

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TM

N

O

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The primary pulley (input shaft side) and the secondary pulley (output shaft side) have the shaft with slope

(fixed cone surface), movable sheave (movable cone surface that can move in the axial direction) and oil pres-

sure chamber at the back of the movable sheave. 

Pulley gear shifting operation 

• Pulley gear shifting operation 

The movable sheave slides on the shaft to change the groove width of the pulley. Input signals of engine

load (accelerator pedal opening), engine revolution and gear ratio (vehicle speed) change the operation

pressures of the primary pulley and the secondary pulley, and controls the pulley groove width.   Along with

change of the pulley groove width, the belt contact radius is changed. This allows continuous and stepless

gear shifting from low to overdrive. “The contact radius ratio of each pulley in contact with the belt x auxiliary

gearbox gear ratio” is the gear ratio. 

AUXILIARY GEARBOX MECHANISM

1st, 2nd and reverse gears are changed with the planetary gear mechanism. 

JSDIA1779GB

JSDIA1967GB