Infiniti M45 (Y34). Manual - part 34

A/T CONTROL SYSTEM

AT-21

D

E

F

G

H

I

J

K

L

M

A

B

AT

CLUTCH AND BAND CHART 

SCIA1524E

AT-22

A/T CONTROL SYSTEM

POWER TRANSMISSION 
“N” Position

Since both the forward brake and the reverse brake are released, torque from the input shaft drive is not trans-
mitted to the output shaft.

“P” Position

●

The same as for the “N” position, both the forward brake and the reverse brake are released, so torque
from the input shaft drive is not transmitted to the output shaft.

●

The parking pole linked with the select lever meshes with the parking gear and fastens the output shaft
mechanically.

1.

Front brake

2.

Input clutch

3.

Direct clutch

4.

High and low reverse clutch

5.

Reverse brake

6.

Forward brake

7.

Low coast brake

8.

1st one-way clutch

9.

Forward one-way clutch

10. 3rd one-way clutch

11.

Front sun gear

12. Input shaft

13. Mid internal gear

14.

Front internal gear

15. Rear carrier

16. Rear sun gear

17.

Mid sun gear

18. Front carrier

19. Mid carrier

20.

Rear internal gear

21. Intermediate shaft

22. Output shaft

23.

Parking gear

24. Parking pawl

SCIA3986J

A/T CONTROL SYSTEM

AT-23

D

E

F

G

H

I

J

K

L

M

A

B

AT

“D”, “M2”, “M3”, “M4” and “M5” Positions 1st Gear

●

The forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.

●

The 1st one-way clutch regulates reverse rotation of the rear sun gear.

●

The 3rd one-way clutch regulates reverse rotation of the front sun gear.

●

During deceleration, the mid sun gear turns forward, so the forward one-way clutch idles and the engine
brake is not activated.

1.

Front brake

2.

Input clutch

3.

Direct clutch

4.

High and low reverse clutch

5.

Reverse brake

6.

Forward brake

7.

Low coast brake

8.

1st one-way clutch

9.

Forward one-way clutch

10. 3rd one-way clutch

11.

Front sun gear

12. Input shaft

13. Mid internal gear

14.

Front internal gear

15. Rear carrier

16. Rear sun gear

17.

Mid sun gear

18. Front carrier

19. Mid carrier

20.

Rear internal gear

21. Intermediate shaft

22. Output shaft

23.

Parking gear

24. Parking pawl

SCIA3987E

AT-24

A/T CONTROL SYSTEM

“M1” Position 1st Gear

●

The front brake fastens the front sun gear.

●

The forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.

●

High and low reverse clutch connects the rear sun gear and the mid sun gear.

●

The low coast brake fastens the mid sun gear.

●

During deceleration, the low coast brake regulates forward rotation of the mid sun gear and the engine
brake functions.

1.

Front brake

2.

Input clutch

3.

Direct clutch

4.

High and low reverse clutch

5.

Reverse brake

6.

Forward brake

7.

Low coast brake

8.

1st one-way clutch

9.

Forward one-way clutch

10. 3rd one-way clutch

11.

Front sun gear

12. Input shaft

13. Mid internal gear

14.

Front internal gear

15. Rear carrier

16. Rear sun gear

17.

Mid sun gear

18. Front carrier

19. Mid carrier

20.

Rear internal gear

21. Intermediate shaft

22. Output shaft

23.

Parking gear

24. Parking pawl

SCIA3988E