2001 Jeep Cherokee XJ repair manual

2001 Jeep Cherokee XJ repair manual

Repairing a 2001 Jeep Cherokee XJ can involve various components and systems, as the vehicle is now more than two decades old. Common repair areas might include the engine, transmission, suspension, and electrical systems. Here are some common repair tasks for a 2001 Jeep Cherokee XJ:

  1. Engine Repairs:
    • Oil Leaks: Address any oil leaks from gaskets or seals.
    • Cooling System: Repair or replace components like the water pump, thermostat, and radiator if they are leaking or not functioning correctly.
    • Engine Tune-up: Replace spark plugs, ignition wires, and air filters as part of regular maintenance.
  2. Transmission Repairs:
  3. Suspension and Steering Repairs:
    • Shocks and Struts: Replace worn-out shocks and struts to improve ride quality.
    • Ball Joints and Tie Rod Ends: Repair or replace worn ball joints and tie rod ends to ensure proper steering and alignment.
  4. Brake System Repairs:
    • Brake Pads and Rotors: Replace worn brake pads and rotors to maintain safe braking performance.
    • Brake Lines: Inspect and replace rusty or damaged brake lines.
  5. Electrical System Repairs:
    • Battery and Alternator: Replace the battery and alternator if they are no longer functioning correctly.
    • Sensors: Address issues with various sensors like the oxygen sensor, throttle position sensor, or crankshaft position sensor.
  6. Exhaust System Repairs:
    • Muffler and Exhaust Pipes: Replace rusted or damaged exhaust components to reduce noise and ensure proper emissions.
  7. HVAC System Repairs:
    • Heater Core: Repair or replace the heater core if you’re experiencing heating issues.
    • A/C System: Address problems with the air conditioning system, including refrigerant leaks and component failures.
  8. Interior and Exterior Repairs:
    • Window Regulators and Motors: Repair or replace malfunctioning window regulators and motors.
    • Door Locks: Fix issues with door locks or handles.
    • Exterior Trim and Body: Repair or replace exterior trim, panels, or body parts as needed.
  9. Rust and Corrosion: The XJ Cherokee is known for rust issues, particularly in the unibody frame and rocker panels. Address rust problems to prevent structural issues.
  10. Drivetrain Repairs:
    • U-joints: Replace worn or damaged U-joints in the driveshaft.
    • Differentials: Repair or replace components in the front and rear differentials if needed.

Remember that the specific repairs needed for your 2001 Jeep Cherokee XJ will depend on its condition, mileage, and maintenance history. It’s essential to consult with a qualified mechanic or Jeep specialist to properly diagnose and address any issues. Regular maintenance and proactive repairs can extend the life of your vehicle and keep it running smoothly.



The NAG1 automatic transmission is an electronically controlled 5-speed transmission with a lock-up clutch in the torque converter. The ratios for the gear stages are obtained by 3 planetary gear sets. Fifth gear is designed as an overdrive with a high-speed ratio.


The 2001 Jeep Cherokee XJ with the AW4 automatic transmission has been a popular choice among Jeep enthusiasts. The AW4 is a four-speed automatic transmission known for its reliability, but like any mechanical component, it can experience issues over time. Here are some common repairs and maintenance tasks related to the AW4 automatic transmission in a 2001 Jeep Cherokee:

  1. Transmission Fluid and Filter Change: Regularly change the transmission fluid and filter to ensure proper lubrication and cooling of the transmission. This should typically be done at specific mileage intervals recommended in the owner’s manual.
  2. Transmission Fluid Leaks: Check for and repair any transmission fluid leaks, which can come from seals, gaskets, or cooler lines. Leaks can lead to low fluid levels and damage to the transmission.
  3. Torque Converter Issues: Problems with the torque converter can lead to issues like shuddering, slipping, or poor acceleration. A faulty torque converter may need to be replaced.
  4. Shift Solenoid Problems: The shift solenoids control the gear changes in an automatic transmission. If they fail, it can result in shifting problems, such as harsh or delayed shifts. Replacing the solenoids may be necessary.
  5. Valve Body Service: Issues with the valve body, which directs the flow of transmission fluid, can cause erratic shifting. A valve body rebuild or replacement may be required.
  6. Overheating: Prevent overheating of the transmission by ensuring the transmission cooler is functioning correctly. Overheating can cause damage to the transmission.
  7. Transmission Control Module (TCM) Issues: Problems with the TCM can result in poor transmission performance. Troubleshoot and, if necessary, replace the TCM.
  8. Torque Converter Lock-Up Clutch: If the lock-up clutch is malfunctioning, it can lead to poor fuel economy and overheating. Repairing or replacing the lock-up clutch is necessary.
  9. Gear Slippage: If the transmission is slipping between gears, it may be caused by worn internal components. A transmission rebuild or replacement may be required in severe cases.
  10. Transmission Flush: Some owners choose to perform a complete transmission fluid flush, but this should be done with caution, as flushing may not be suitable for all situations. Consult your owner’s manual and a trusted mechanic for guidance.

It’s important to consult a qualified mechanic or transmission specialist for a proper diagnosis and repair of any transmission issues. Routine maintenance, such as regular fluid changes, can help prevent many transmission problems and extend the life of your 2001 Jeep Cherokee XJ with the AW4 automatic transmission.

2001 Jeep Cherokee transmission repair manual

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