Jeep Maintenance & Leak Inspection Checklist

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✅ Routine Fluid Maintenance

• ▢ Engine Oil

  • Change every 5,000 miles (synthetic) or 3,000 miles (conventional)

  • Don’t overtighten the oil filter cap on 3.6L engines (torque to 25 Nm)

• ▢ Transmission Fluid

  • Change every 30,000 miles

  • Inspect for fluid level and clarity

• ▢ Transfer Case Fluid

  • Change every 30,000 miles

  • Use Jeep-approved fluid only

• ▢ Differential Fluid

  • Change every 30,000 miles

  • Check for gear oil leaks at the differential covers and axle seals

• ▢ Brake Fluid

  • Replace every 2 years or 24,000 miles

  • Look for darkened fluid or air in the lines

• ▢ Coolant/Antifreeze

  • Check level in overflow tank and radiator when engine is cold

  • Replace every 5 years or as recommended

  • Only use the correct coolant type to avoid chemical reactions (e.g., pink organic coolant issues)

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🛠️ Top Places to Check for Leaks

Use this list to visually inspect your Jeep for potential fluid leaks:

• ▢ Radiator (bottom side)

  • Look for pinkish buildup or crust—could signal coolant leaks

  • Pay attention to coolant smells even when parked

• ▢ Oil Filter Housing Adapter

  • Common leak point in 3.6L Jeeps

  • Check underneath the intake manifold and down the back of the engine

• ▢ Rear Main Seal

  • Inspect where the engine meets the transmission

  • Oil buildup or dripping may indicate failure

• ▢ Front and Rear Differentials

  • Check around the diff covers, pinion seals, and axle shafts

  • Look for gear oil leaks and splatter on undercarriage

• ▢ Transmission and Transfer Case

  • Watch for red or dark brown fluid at the rear or center of your Jeep

  • Inspect around the output shaft and tail housing

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🧰 Additional Maintenance Must-Dos

• ▢ Tire Rotation (every 5,000 miles)

  • Helps prevent uneven wear

  • While rotating, inspect brake pad thickness

• ▢ Inspect Brake Pads

  • Every 12,000 miles

  • Replace if worn or cracked

• ▢ Air Filter Replacement

  • Every 15,000–30,000 miles

  • Replace sooner if driving in dusty/off-road conditions

• ▢ Undercarriage Care

  • Wash thoroughly after each off-road trip

  • Inspect skid plates, suspension, fuel/brake lines, and mounts for damage

• ▢ Check for Fluid Cross-Contamination

  • Never mix coolant types (green and orange/pink)

  • Watch for signs of milky oil (could indicate coolant leak into oil)

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🔧 Pro Tip:

Regular inspections can help you catch leaks and worn components before they cause serious (and expensive) damage. Keep a log of maintenance dates and fluid changes!