Nissan Armada 2025-2026 Service and Repair Manual: General Precautions

• Ignition switch OFF and disconnect the battery cable from the negative terminal before connecting or disconnecting the A/T assembly connector. Because battery voltage is applied to TCM even if ignition switch is switched OFF.

  

• Perform “DTC (Diagnostic Trouble Code) CONFIRMATION PROCEDURE” after performing each TROUBLE DIAGNOSIS.

  

  If the repair is completed DTC should not be displayed in the “DTC CONFIRMATION PROCEDURE”.

• Always use the specified brand of ATF.

• Use lint-free paper not cloth rags during work.

• Dispose of the waste oil using the methods prescribed by law, ordinance, etc. after replacing the ATF.

• Before proceeding with disassembly, thoroughly clean the outside of the transmission. It is important to prevent the internal parts from becoming contaminated by dirt or other foreign matter.

• Disassembly should be done in a clean work area.

• Use lint-free paper or towels for wiping parts clean. Common shop rags can leave fibers that could interfere with the operation of the transmission.

• Place disassembled parts in order for easier and proper assembly.

• All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or reassembly.

• Gaskets, seals and O-rings should be replaced any time the A/T is disassembled.

• It is very important to perform functional tests whenever they are indicated.

• Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.

• Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings and seals, or hold bearings and washers in place during assembly. Never use grease.

• Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.

• Occasionally, the parking gear may be locked with the torque insufficiently released, when stopping the vehicle by switching the shift position from “D” or “R” to “P” position with the brake pedal depressed.

  In this case, the shock with a thud caused by the abrupt release of torque may occur when switching the shift position “P” position to other positions.

  However, this symptom is not a malfunction which results in the damage of parts.

• To avoid the risk of minor injury or property damage: If the 12-volt battery has low or no voltage, the transmission cannot be shifted. Replace the battery or repair the damaged power supply system. If towing the vehicle, follow the tow procedure, refer to Tow Truck Towing.

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