Infiniti FX35, FX50 (S51). Manual - part 1812

SHIFT MECHANISM

TM-55

< SYSTEM DESCRIPTION >

[7AT: RE7R01A (VQ35HR)]

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• The under drive carrier is fixed by the front brake.
• The input clutch gets engaged and connects the mid internal gear with the rear carrier.
• The high and low reverse clutch gets engaged and connects the rear sun gear with the mid sun gear.
• Each planetary gear enters state described below.

JSDIA0874GB

TM-56

< SYSTEM DESCRIPTION >

[7AT: RE7R01A (VQ35HR)]

SHIFT MECHANISM

Front planetary gear

Under drive planetary gear

Rear planetary gear

Mid planetary gear

“R” Position

Name

Front sun gear

Front carrier

Front internal gear

Condition

—

Output

Input

Direction of rotation

Counterclockwise revolution

Clockwise revolution

Clockwise revolution

Number of revolutions

Deceleration from front internal 

gear

Deceleration from front internal 

gear

Same number of revolution as the 

input shaft

Name

Under drive sun gear

Under drive carrier

Under drive internal gear

Condition

—

Fixed

Input/Output

Direction of rotation

Counterclockwise revolution

—

Clockwise revolution

Number of revolutions

Acceleration from under drive inter-

nal gear

—

Same number of revolution as the 

front carrier

Name

Rear sun gear

Rear carrier

Rear internal gear

Condition

—

Input/Output

Input

Direction of rotation

Clockwise revolution

Clockwise revolution

Clockwise revolution

Number of revolutions

Acceleration from rear carrier

Same number of revolution as the 

input shaft

Same number of revolution as the 

under drive internal gear

Name

Mid sun gear

Mid carrier

Mid internal gear

Condition

—

Output

Input

Direction of rotation

Clockwise revolution

Clockwise revolution

Clockwise revolution

Number of revolutions

Acceleration from mid internal gear

Acceleration from mid internal gear

Same number of revolution as the 

input shaft

SHIFT MECHANISM

TM-57

< SYSTEM DESCRIPTION >

[7AT: RE7R01A (VQ35HR)]

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• The 1st one-way clutch and the front brake regulates counterclockwise rotation of the under drive carrier.

NOTE:
The front brake operates at the fixed speed or less.

• The rear carrier and the mid internal gear are fixed by the reverse brake.
• The mid sun gear rotates at the same speed as the rear sun gear by operation of the 2nd one-way clutch

and the high and low reverse clutch.
NOTE:
The high and low reverse clutch operates at the fixed speed or less.

JSDIA0875GB

TM-58

< SYSTEM DESCRIPTION >

[7AT: RE7R01A (VQ35HR)]

SHIFT MECHANISM

• Each planetary gear enters the state described below.

Front planetary gear

Under drive planetary gear

Rear planetary gear

Mid planetary gear

Component Parts Location

INFOID:0000000005250017

Refer to 

TM-33, "Cross-Sectional View"

.

Component Description

INFOID:0000000005250018

Name

Front sun gear

Front carrier

Front internal gear

Condition

—

Output

Input

Direction of rotation

Counterclockwise revolution

Clockwise revolution

Clockwise revolution

Number of revolutions

Deceleration from front internal 

gear

Deceleration from front internal 

gear

Same number of revolution as the 

input shaft

Name

Under drive sun gear

Under drive carrier

Under drive internal gear

Condition

—

Fixed

Input/Output

Direction of rotation

Counterclockwise revolution

—

Clockwise revolution

Number of revolutions

Acceleration from under drive inter-

nal gear

—

Same number of revolution as the 

front carrier

Name

Rear sun gear

Rear carrier

Rear internal gear

Condition

Output

Fixed

Input

Direction of rotation

Counterclockwise revolution

—

Clockwise revolution

Number of revolutions

Acceleration from rear internal 

gear

—

Same number of revolution as the 

under drive internal gear

Name

Mid sun gear

Mid carrier

Mid internal gear

Condition

Input

Output

Fixed

Direction of rotation

Counterclockwise revolution

Counterclockwise revolution

—

Number of revolutions

Same number of revolution as the 

rear sun gear

Deceleration from mid sun gear

—

Name of the Part (Abbreviation)

Function

Front brake (FR/B)

Fastens the under drive carrier.

Input clutch (I/C)

Connects the mid internal gear and the rear carrier.

Direct clutch (D/C)

Connects the rear carrier and the rear sun gear.

High and low reverse clutch (HLR/C)

Connects the rear sun gear and the mid sun gear.

Reverse brake (R/B)

Fastens the rear carrier.

Low brake (L/B)

Fastens the mid sun gear.

2346 brake (2346/B)

Fastens the under drive sun gear.

1st one-way clutch (1st OWC)

Allows the under drive carrier to turn freely in the forward direction but fastens it for reverse 
rotation.

2nd one-way clutch (2nd OWC)

Allows the rear sun gear to turn freely in the forward direction but fastens it for reverse ro-
tation.

Torque converter

Amplifies driving force the engine, and transmits it to transmission input shaft.

Oil pump

Driven by the engine, oil pump supplies oil to torque converter, control valve assembly, and 
each lubricating system.