Lexus RX300 (MCU15). Service manual - part 564

AUTOMATIC TRANSAXLE

AUTOMATIC TRANSAXLE SYSTEM

AX–1

. . . . . . . 

COMPONENT PARTS

AX–3

. . . . . . . . . . . . . . . . . . . . 

OIL PUMP

AX–55

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

DIRECT CLUTCH

AX–59

. . . . . . . . . . . . . . . . . . . . . . . . 

FORWARD CLUTCH

AX–65

. . . . . . . . . . . . . . . . . . . . . 

SECOND BRAKE

AX–72

. . . . . . . . . . . . . . . . . . . . . . . . 

UNDERDRIVE PLANETARY GEAR

AX–76

. . . . . . . . 

UNDERDRIVE CLUTCH

AX–81

. . . . . . . . . . . . . . . . . . 

VALVE BODY

AX–87

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

UPPER VALVE BODY

AX–94

. . . . . . . . . . . . . . . . . . . . 

LOWER VALVE BODY

AX–98

. . . . . . . . . . . . . . . . . . . . 

DIFFERENTIAL CASE

AX–102

. . . . . . . . . . . . . . . . . . . . 

TRANSFER

AX–118

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

AX0AG–08

D03851

Direct Clutch (C

2

)

No.1 One–way Clutch
(F

1

)

U/D Brake (B

3

)

No.2 One–way
Clutch (F

2

)

U/D Clutch
(C

3

)

2nd Brake (B

1

)

1st & Reverse Brake
(B

2

)

Forward Clutch (C

1

)

Shift lever range

P

N

R

D

L

2

C

3

Gear position

C

1

C

2

F

2

B

1

B

2

B

3

Reverse

Parking

Neutral

1st

2nd

3rd

O/D

1st

2nd

f

1st

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f

f ... Operating

F

1

f

f

f

f

f

f

–

AUTOMATIC TRANSAXLE

AUTOMATIC TRANSAXLE SYSTEM

AX–1

U140F AX   (RM848E)

AUTOMATIC TRANSAXLE SYSTEM

OPERATION

D04090

C

1

B

2

F

1

B

1

C

2

C

3

B

3

F

2

IN

OUT

AX–2

–

AUTOMATIC TRANSAXLE

AUTOMATIC TRANSAXLE SYSTEM

U140F AX   (RM848E)

FUNCTION OF COMPONENTS

Component

Function

C

1

Forward Clutch

Connects input shaft and front planetary sun gear.

C

2

Direct Clutch

Connects input shaft and rear planetary sun gear.

C

3

U/D Clutch

Connects U/D sun gear and U/D planetary carrier.

B

1

2nd Brake

Prevents rear planetary sun gear from turning either clockwise

or counterclockwise.

B

2

1st & Reverse Brake

Prevents rear planetary carrier and front planetary ring gear

from turning either clockwise or counterclockwise.

B

3

U/D Brake

Prevents U/D sun gear from turning either clockwise or coun-

terclockwise.

F

1

No.1 One–way Clutch

Prevents rear planetary carrier from turning counterclockwise.

F

2

No.2 One–way Clutch

Prevents U/D planetary sun gear from turning clockwise.

Planetary Gears

These gears change the route through which driving force is

transmitted, in accordance with the operation of each clutch

and brake, in order to increase or reduce the input and output

speed.