Automatic Transmission: Maintenance Nissan Armada I

CHECKING AND CHANGING A/T FLUID SERVICE

Increase ATF temperature by 80°C (176°F) once, and then check ATF level in 65°C (149°F) when adjusting ATF level.

Note. JA60 uses both systems of a water-cooling and of an air-cooling. Air-cooling system has a by-pass valve. When ATF temperature is not over 50°C (122°F) with water-cooling system OFF, it does not flow to air-cooling system. If ATF level is set without the flow of ATF, the level will be 10 mm lower than the standard. Therefore, piping should be filled with ATF when adjusting level.

Changing A/T Fluid

Refer to CHANGING A/T FLUID .

Checking A/T Fluid

Refer to CHECKING A/T FLUID .

A/T Fluid Cooler Cleaning

Whenever an automatic transmission 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 contaminate 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.

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1. Position an oil pan under the automatic transmission's inlet and outlet cooler hoses.
2. Identify the inlet and outlet fluid cooler hoses.
3. Disconnect the fluid cooler inlet and outlet rubber hoses from the steel cooler tubes or bypass valve. NOTE: Replace the cooler hoses if rubber material from the hose remains on the tube fitting.
4. Allow any A/T fluid 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 outlet 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 Transmission 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 air gun tip and of the cooler outlet hose.
9. Blow compressed air regulated to 5 - 9 kg/cm 2 (70 - 130 psi) through the cooler outlet hose for 10 seconds 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 steel lines to the transmission.
12. Remove the banjo bolts.
13. Flush each steel line from the cooler side back toward the transmission 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 transmission 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 «A/T FLUID COOLER DIAGNOSIS PROCEDURE»(ref-233274-S27682755122006052500000) .

At Low Fluid Temperature

When the A/T fluid temperature drops below the prescribed temperature, in order to speed up the action of each friction element, the line pressure is set higher than the normal line pressure characteristic.

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Fluid Leakage and Fluid Level Check

1. Inspect for fluid leakage and check the fluid level. Refer to «Checking A/T Fluid»(ref-233274-S06919956272006052500000) .

Fluid Condition Check

Inspect the fluid condition.

FLUID CONDITION

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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. Engine start, apply foot brake, and place selector lever in "D" position.
5. While holding down the foot brake, gradually press down the accelerator pedal.
6. Quickly read off the stall speed, then quickly remove your foot from the accelerator pedal. CAUTION: Do not hold down the accelerator pedal for more than 5 seconds during this test.
7. Move the selector lever to the "N" position.
8. Cool down the ATF. CAUTION: Run the engine at idle for at least one minute. Stall speed: 2,500 - 2,800 rpm

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STALL TEST STANDARD VALUE POSITION

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1. Inspect the amount of engine oil and replenish if necessary.
2. Drive the car for about 10 minutes to warm it up so that the ATF reaches in range of 50 to 80°C (122 to 176°F), then inspect the amount of ATF and replenish if necessary. NOTE: The automatic fluid temperature rises in range of 50 to 80°C (122 to 176°F) during 10 minutes of driving.
3. After warming up remove the oil pressure detection plug and install the oil pressure gauge [ST2505S001 (J-34301-C)]. CAUTION: When using the oil pressure gauge, be sure to use the O-ring attached to the oil pressure detection plug.
4. Securely engage the parking brake so that the tires do not turn.
5. Start the engine, then measure the line pressure at both idle and the stall speed. CAUTION: Keep the brake pedal pressed all the way down during measurement. When measuring the line pressure at the stall speed, refer to «STALL TEST»(ref-233274-S19475013162006052500000) .
6. After the measurements are complete, install the oil pressure detection plug and tighten to the regulation torque below. :7.3 N.m (0.74 kg-m, 65 in-lb) CAUTION: Do not reuse the O-ring.