Jeep Maintenance & Leak Inspection Checklist

Keep Your Jeep in Peak Condition 

Jeep Maintenance Made Easy!

✅ 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)

🛠️ 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

🧰 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)

🔧 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!

Written by Tammy "Jeep Momma" Forsyth  - a Jeep Wrangler owner, off-road enthusiast, and content creator who has explored trails across Colorado, Wyoming, Arizona, Utah, and beyond. Through Jeep Momma, she shares firsthand Wrangler ownership experiences, trail guides, DIY modifications, camping setups, and Jeep community stories to help new and experienced Jeep owners get more from their adventures.

👉About Jeep Momma