Infiniti FX35, FX50 (S51). Manual - part 1839

 

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Infiniti FX35, FX50 (S51). Manual - part 1839

 

 

A/T FLUID COOLER

TM-163

< PERIODIC MAINTENANCE >

[7AT: RE7R01A (VQ35HR)]

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A/T FLUID COOLER

Cleaning

INFOID:0000000005250147

Whenever an A/T is 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 ATF. In either case, mal-
function of the newly serviced A/T may result.
Debris, if present, may build up as ATF 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.

CLEANING PROCEDURE

1.

Position an oil pan under the A/T inlet and outlet cooler hoses.

2.

Identify the inlet and outlet fluid cooler hoses.

3.

Disconnect the A/T fluid cooler inlet and outlet rubber hoses
from the steel cooler tubes or by-pass valve.
NOTE:
Replace the cooler hoses if rubber material from the hose
remains on the tube fitting.

4.

Allow any ATF that remains in the cooler hoses to drain into the
oil pan.

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 Transmission Cooler Cleaner only with adequate

ventilation.

• Avoid contact with eyes and skin.
• Never 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 ATF 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 air gun tip and of the cooler outlet
hose.

9.

Blow compressed air regulated to 5 to 9 kg/cm

2

 (71 to 128 psi)

through the cooler outlet hose for 10 seconds to force out any
remaining ATF.

10. Repeat steps 5 through 9 three additional times.

11. Position an oil pan under the banjo bolts that connect the A/T

fluid cooler steel lines 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 to 9 kg/cm

2

 (71 to 128 psi) through each steel line from the cooler

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

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 “DIAGNOSIS PROCEDURE”.

JPDIA0711GB

JPDIA0712GB

JPDIA0713GB

TM-164

< PERIODIC MAINTENANCE >

[7AT: RE7R01A (VQ35HR)]

A/T FLUID COOLER

DIAGNOSIS PROCEDURE

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

1.

Position an oil pan under the A/T inlet and outlet cooler hoses.

2.

Clean the exterior and tip of the cooler inlet hose.

3.

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 Transmission Cooler Cleaner only with adequate

ventilation.

• Avoid contact with eyes and skin.
• Never breath vapors or spray mist.

4.

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 ATF flows out of the cooler inlet hose for 5 seconds.

5.

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

6.

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

7.

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

8.

Blow compressed air regulated to 5 to 9 kg/cm

2

 (71 to 128 psi)

through the cooler outlet hose to force any remaining ATF into
the coffee filter.

9.

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

10. Perform “INSPECTION PROCEDURE”.

INSPECTION PROCEDURE

1.

Inspect the coffee filter for debris.

a.

If small metal debris less than 1 mm (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.

JPDIA0712GB

JPDIA0714GB

JPDIA0715GB

SCIA2967E

A/T FLUID COOLER

TM-165

< PERIODIC MAINTENANCE >

[7AT: RE7R01A (VQ35HR)]

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b.

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

CO-14, "Exploded View"

.

Inspection

INFOID:0000000005250148

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

SCIA7031E

TM-166

< PERIODIC MAINTENANCE >

[7AT: RE7R01A (VQ35HR)]

STALL TEST

STALL TEST

Inspection and Judgment

INFOID:0000000005250149

INSPECTION

1.

Inspect the amount of engine oil. Replenish the engine oil if necessary.

2.

Drive for about 10 minutes to warm up the vehicle so that the A/T fluid temperature is 50 to 80

°

C (122 to

176

°

F). Inspect the amount of ATF. Replenish if necessary.

3.

Securely engage the parking brake so that the tires do not turn.

4.

Start the engine, apply foot brake, and place selector lever in “D” position.

5.

Gradually press down the accelerator pedal while holding down the foot brake.

6.

Quickly read off the stall speed, and then quickly release the accelerator pedal.

CAUTION:

Never hold down the accelerator pedal for more than 5 seconds during this test.

7.

Shift the selector lever to “N” position.

8.

Cool down the ATF.

CAUTION:

Run the engine at idle for at least 1 minute.

9.

Repeat steps 5 through 8 with selector lever in “R” position.

JUDGMENT OF STALL TEST

O: Stall speed within standard value position

H: Stall speed higher than standard value

L: Stall speed lower than standard value

Stall test standard value position

Stall speed

: Refer to 

TM-188, "Stall Speed"

.

Selector lever position

Possible location of malfunction

“D” and “M”

“R”

Stall speed

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• Low brake
• 1st one-way clutch
• 2nd one-way clutch

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• Reverse brake
• 1st one-way clutch
• 2nd one-way clutch

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• Engine and torque converter one-way clutch

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• Line pressure low

Does not shift-up “D” or “M” position 1 

 2

Slipping in 2GR, 3GR 4GR or 6GR

2346 brake slippage

Does not shift-up “D” or “M” position 2 

 3

Slipping in 3GR, 4GR or 5GR

Direct clutch slippage

Does not shift-up “D” or “M” position 3 

 4

Slipping in 4GR, 5GR, 6GR or 7GR

High and low reverse clutch slippage

Does not shift-up “D” or “M” position 4 

 5

Slipping in 5GR, 6GR or 7GR

Input clutch slippage

Does not shift-up “D” or “M” position 5 

 6

Slipping in 2GR, 3GR, 4GR or 6GR

2346 brake slippage

Does not shift-up “D” or “M” position 6 

 7

Slipping in 7GR

Front brake slippage

 

 

 

 

 

 

 

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