Nissan Pathfinder (2007 year). Instruction — part 6
A/T CONTROL SYSTEM
AT-19
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2007 Pathfinder
4WD models
SCIA5268E
1.
Front planetary gear
2.
Mid planetary gear
3.
Rear planetary gear
4.
Direct clutch
5.
High and low reverse clutch
6.
Reverse brake
7.
Drum support
8.
Forward brake
9.
Low coast brake
10. Input shaft
11.
Torque converter
12. Oil pump
13. Front brake
14.
3rd one-way clutch
15. Input clutch
16. 1st one-way clutch
17.
Control valve with TCM
18. Forward one-way clutch
19. Adapter case
20.
Output shaft
AT-20
A/T CONTROL SYSTEM
2007 Pathfinder
Shift Mechanism
ECS00EEN
The automatic transmission uses compact triple planetary gear systems to improve power-transmission effi-
ciency, simplify construction and reduce weight.
It also employs an optimum shift control and super wide gear ratios. They improve starting performance and
acceleration during medium and high-speed operation.
CONSTRUCTION
FUNCTION OF CLUTCH AND BRAKE
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. Output shaft
22. Parking gear
23.
Parking pawl
PCIA0002J
Name of the Part
Abbreviation
Function
Front brake (1)
FR/B
Fastens the front sun gear (11).
Input clutch (2)
I/C
Connects the input shaft (12), the front internal gear (14) and the mid internal
gear (13).
Direct clutch (3)
D/C
Connects the rear carrier (15) and the rear sun gear (16).
High and low reverse clutch (4)
HLR/C
Connects the mid sun gear (17) and the rear sun gear (16).
Reverse brake (5)
R/B
Fastens the rear carrier (15).
Forward brake (6)
Fwd/B
Fastens the mid sun gear (17).
Low coast brake (7)
LC/B
Fastens the mid sun gear (17).
1st one-way clutch (8)
1st WOC
Allows the rear sun gear (16) to turn freely forward relative to the mid sun gear
(17) but fastens it for reverse rotation.
Forward one-way clutch (9)
Fwd OWC
Allows the mid sun gear (17) to turn freely in the forward direction but fastens it
for reverse rotation.
3rd one-way clutch (10)
3rd OWC
Allows the front sun gear (11) to turn freely in the forward direction but fastens
it for reverse rotation.
A/T CONTROL SYSTEM
AT-21
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2007 Pathfinder
CLUTCH AND BAND CHART
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—Operates
●
—Operates during “progressive” acceleration.
●
—Operates and effects power transmission while coasting.
●
—Line pressure is applied but does not affect power transmission.
●
—Operates under conditions shown in HLR/C Operating Condition
●
—Operates under conditions shown in LC/B Operating Condition. Delay control is applied during D (4,3,2,1)
Þ
N shift.
●
*1: A/T will not shift to 5th when overdrive control switch is set in “OFF” position.
Shift position
I/C
HLR/C
D/C
R/B
FR/B
LC/B
Fwd/B
1st
OWC
Fwd
OWC
3rd
OWC
Remarks
P
PARK POSITION
R
REVERSE POSI-
TION
N
NEUTRAL POSI-
TION
D*1
1st
Automatic shift
1
⇔
2
⇔
3
⇔
4
⇔
5
2nd
3rd
4th
5th
3
1st
Automatic shift
1
⇔
2
⇔
3
⇐
4
2nd
3rd
4th
2
1st
Automatic shift
1
⇔
2
⇐
3
⇐
4
2nd
3rd
4th
1
1st
Locks (held sta-
tionary in 1st
gear)
1
⇐
2
⇐
3
⇐
4
2nd
3rd
4th
SCIA5642E
AT-22
A/T CONTROL SYSTEM
2007 Pathfinder
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 pawl 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. Output shaft
22. Parking gear
23. Parking pawl
PCIA0003J
A/T CONTROL SYSTEM
AT-23
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2007 Pathfinder
“D”, “3” and “2” 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. Output shaft
22. Parking gear
23. Parking pawl
SCIA1512E
AT-24
A/T CONTROL SYSTEM
2007 Pathfinder
“1 ” 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. Output shaft
22. Parking gear
23. Parking pawl
SCIA1513E
A/T CONTROL SYSTEM
AT-25
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2007 Pathfinder
“D” and “3” Positions 2nd Gear
●
The forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
●
The 3rd one-way clutch regulates reverse rotation of the front sun gear.
●
The direct clutch is coupled and the rear carrier and rear sun gear are connected.
●
During deceleration, the mid sun gear turns forward, so the forward one-way clutch idles and 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. Output shaft
22. Parking gear
23. Parking pawl
SCIA1514E
AT-26
A/T CONTROL SYSTEM
2007 Pathfinder
“2” and “1” Positions 2nd 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.
●
The direct clutch is coupled, and the rear carrier and rear sun gear are connected.
●
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. Output shaft
22. Parking gear
23. Parking pawl
SCIA1515E
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