Nissan Pathfinder (2006 year). Instruction — part 3

A/T FLUID

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2006 Pathfinder

●

When the color of the ATF coming out of the auxiliary transmission oil cooler hose return line is about
the same as the color of the new ATF, flushing out the old ATF is complete. The amount of new ATF
used for flushing should be 30% to 50% of the specified capacity.

CAUTION:

●

Use only Genuine NISSAN ATF and do not mix with other fluids.

●

Using automatic transmission fluid other than Genuine NISSAN ATF will cause deterioration in
driveability and automatic transmission durability, and may damage the automatic transmis-
sion, which is not covered by the warranty.

●

When filling the transmission with ATF, do not spill the ATF on any heat generating parts such
as the exhaust manifold.

●

Do not reuse the drain plug gasket.

5.

Drive the vehicle to warm up the ATF to approximately 80

°

C (176

°

F).

6.

Install the ATF level gauge and tighten the ATF level gauge bolt to specification.

7.

Check the fluid level and condition. If the ATF is still dirty, repeat
steps 2 through 6.

8.

Install the ATF level gauge in the charging pipe and install the ATF level gauge bolt.

9.

Tighten the ATF level gauge bolt to specification.

A/T Fluid Cooler Cleaning

ECS00EEL

Whenever an A/T is repaired, overhauled, or replaced, the A/T fluid cooler mounted in the radiator must be
inspected and cleaned.
Metal debris and friction material, if present, can become trapped in the A/T fluid cooler. This debris can con-
taminate the newly serviced A/T or, in severe cases, can block or restrict the flow of A/T fluid. In either case,
malfunction of the newly serviced A/T may result.
Debris, if present, may build up as A/T fluid enters the cooler inlet. It will be necessary to back flush the cooler
through the cooler outlet in order to flush out any built up debris.

A/T FLUID COOLER CLEANING PROCEDURE

1.

Position a drain pan under the A/T inlet and outlet fluid cooler tube to cooler hose connection.

2.

Put a different color matching mark on each cooler tube to cooler hose connection to aid in assembly.

CAUTION:

Use paint to make the matching mark. Do not damage the tubes or hose.

ATF type and capacity

: Refer to

MA-11, "Fluids and Lubricants"

.

ATF level gauge bolt

: Refer to

AT-252, "Components"

.

LLIA0071E

ATF level gauge bolt

: Refer to

AT-252, "Components"

.

AT-16

A/T FLUID

2006 Pathfinder

3.

Disconnect the fluid cooler inlet and outlet rubber hoses from the
steel cooler tubes.

NOTE:
Replace the cooler hoses if rubber material from the hose
remains on the tube fitting.

4.

Drain any A/T fluid from the cooler hose.

5.

Insert the extension adapter hose of a can of Transmission
Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.

CAUTION:

●

Wear safety glasses and rubber gloves when spraying
the Transmission Cooler Cleaner.

●

Spray cooler cleaner only with adequate ventilation.

●

Avoid contact with eyes and skin.

●

Do not breath vapors or spray mist.

6.

Hold the hose and can as high as possible and spray Transmis-
sion Cooler Cleaner in a continuous stream into the cooler outlet
hose until fluid flows out of the cooler inlet hose for 5 seconds.

7.

Insert the tip of an air gun into the end of the cooler outlet hose.

8.

Wrap a shop rag around the tip of the air gun and the cooler out-
let hose.

9.

Blow compressed air regulated to 5 - 9 kg/cm

2

(70 - 130 psi) through the cooler outlet hose for 10 sec-

onds to force out any remaining fluid.

10. Repeat steps 5 through 9 three additional times.

11. Position an oil pan under the banjo bolts that connect the fluid cooler tubes to the A/T.

12. Remove the banjo bolts.
13. Flush each steel line from the cooler side back toward the A/T by spraying Transmission Cooler Cleaner

in a continuous stream for 5 seconds.

14. Blow compressed air regulated to 5 - 9 kg/cm

2

(70 - 130 psi) through each steel line from the cooler side

back toward the A/T for 10 seconds to force out any remaining fluid.

15. Ensure all debris is removed from the steel cooler lines.

16. Ensure all debris is removed from the banjo bolts and fittings.

17. Perform

AT-16, "A/T FLUID COOLER DIAGNOSIS PROCEDURE"

.

A/T FLUID COOLER DIAGNOSIS PROCEDURE

NOTE:
Insufficient cleaning of the cooler inlet hose exterior may lead to inaccurate debris identification.

1.

Position a drain pan under the A/T inlet and outlet fluid cooler tube to cooler hose connection.

2.

Clean the exterior and tip of the cooler inlet hose.

3.

Put a different color matching mark on each cooler tube to cooler hose connection to aid in assembly.

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A/T FLUID

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2006 Pathfinder

CAUTION:

Use paint to make the matching mark. Do not damage the tubes or hose.

4.

Disconnect the fluid cooler inlet and outlet rubber hoses from the
steel cooler tubes.

NOTE:
Replace the cooler hoses if rubber material from the hose
remains on the tube fitting.

5.

Insert the extension adapter hose of a can of Transmission
Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.

CAUTION:

●

Wear safety glasses and rubber gloves when spraying
the Transmission Cooler Cleaner.

●

Spray cooler cleaner only with adequate ventilation.

●

Avoid contact with eyes and skin.

●

Do not breath vapors or spray mist.

6.

Hold the hose and can as high as possible and spray Transmis-
sion Cooler Cleaner in a continuous stream into the cooler outlet
hose until fluid flows out of the cooler inlet hose for 5 seconds.

7.

Tie a common white, basket-type coffee filter to the end of the
cooler inlet hose.

8.

Insert the tip of an air gun into the end of the cooler outlet hose.

9.

Wrap a shop rag around the air gun tip and end of cooler outlet
hose.

10. Blow compressed air regulated to 5 - 9 kg/cm

2

(70 - 130 psi)

through the cooler outlet hose to force any remaining A/T fluid
into the coffee filter.

11. Remove the coffee filter from the end of the cooler inlet hose.

12. Perform A/T fluid cooler inspection. Refer to

AT-18, "A/T FLUID

COOLER INSPECTION PROCEDURE"

.

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AT-18

A/T FLUID

2006 Pathfinder

A/T FLUID COOLER INSPECTION PROCEDURE

1.

Inspect the coffee filter for debris.

a.

If small metal debris less than 1mm (0.040 in) in size or metal
powder is found in the coffee filter, this is normal. If normal
debris is found, the A/T fluid cooler/radiator can be re-used and
the procedure is ended.

b.

If one or more pieces of debris are found that are over 1mm
(0.040 in) in size and/or peeled clutch facing material is found in
the coffee filter, the fluid cooler is not serviceable. The A/T fluid
cooler/radiator must be replaced and the inspection procedure is
ended. Refer to

CO-14, "RADIATOR"

.

A/T FLUID COOLER FINAL INSPECTION

After performing all procedures, ensure that all remaining oil is cleaned from all components.

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A/T CONTROL SYSTEM

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2006 Pathfinder

A/T CONTROL SYSTEM

PFP:31036

Cross-Sectional View

ECS00EEM

2WD models

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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. Rear extension

20.

Output shaft

AT-20

A/T CONTROL SYSTEM

2006 Pathfinder

4WD models

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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

A/T CONTROL SYSTEM

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2006 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.

AT-22

A/T CONTROL SYSTEM

2006 Pathfinder

CLUTCH AND BAND CHART

●

—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

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