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Nissan Pathfinder (2005 year). Manual - part 5

PREPARATION

AT-11

2005 Pathfinder

ST25850000
(J-25721-A)
Sliding hammer

Remove oil pump assembly
a: 179 mm (7.05 in)
b: 70 mm (2.76 in)
c: 40 mm (1.57 in)
d: M12X1.75P

—

(J-47002)
Transmission jack adapter kit
1.

—

(J-47002-1)
Center bracket
2.

—

(J-47002-3)
Adapter plate
3.

—

(J-47002-4)
Adapter block

Assist in removal of transmission and transfer
case as one assembly using only one trans-
mission jack.

Tool number
(Kent-Moore No.)

Tool name

Description

NT422

WCIA0499E

AT-12

PREPARATION

2005 Pathfinder

Commercial Service Tools

UCS00317

Tool name

Description

Power tool

Loosening bolts and nuts

Drift

Installing manual shaft seals
a: 22 mm (0.87 in) dia.

Drift

Installing rear oil seal (4WD models)
a: 64 mm (2.52 in) dia.

PBIC0190E

NT083

SCIA5338E

A/T FLUID

AT-13

2005 Pathfinder

A/T FLUID

PFP:KLE40

Changing A/T Fluid

UCS00318

Refer to

MA-24, "Changing the Automatic Transmission Fluid (ATF)"

Checking A/T Fluid

UCS00319

Refer to

MA-22, "Checking the Automatic Transmission Fluid (ATF)"

A/T Fluid Cooler Cleaning

UCS0031A

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

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

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.

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.

Drain any A/T fluid from the cooler hose.

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.

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.

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

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

SCIA3830E

SCIA3831E

SCIA3832E

AT-14

A/T FLUID

2005 Pathfinder

Blow compressed air regulated to 5 - 9 kg/cm

(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

(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-14, "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.

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

Clean the exterior and tip of the cooler inlet hose.

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.

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.

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.

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.

SCIA3830E

SCIA3831E

A/T FLUID

AT-15

2005 Pathfinder

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

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

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

(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-15, "A/T FLUID

COOLER INSPECTION PROCEDURE"

A/T FLUID COOLER INSPECTION PROCEDURE

Inspect the coffee filter for debris.

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.

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-11, "RADIATOR"

A/T FLUID COOLER FINAL INSPECTION

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

SCIA3833E

SCIA3834E

SCIA2967E

SCIA5659E

AT-16

A/T CONTROL SYSTEM

2005 Pathfinder

A/T CONTROL SYSTEM

PFP:31036

Cross-Sectional View

UCS0031B

2WD models

SCIA5267E

Front planetary gear

Mid planetary gear

Rear planetary gear

Direct clutch

High and low reverse clutch

Reverse brake

Drum support

Forward brake

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

A/T CONTROL SYSTEM

AT-17

2005 Pathfinder

4WD models

SCIA5268E

Front planetary gear

Mid planetary gear

Rear planetary gear

Direct clutch

High and low reverse clutch

Reverse brake

Drum support

Forward brake

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-18

A/T CONTROL SYSTEM

2005 Pathfinder

Shift Mechanism

UCS0031D

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

Front brake

Input clutch

Direct clutch

High and low reverse clutch

Reverse brake

Forward brake

Low coast brake

1st one-way clutch

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.

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