Installation of Nissan Rear Axle Breather / Vent and Differential Fluid Check

Introduction

This tutorial provides a step-by-step guide for installing an aftermarket rear axle breather/vent on Nissan vehicles, specifically those with C200K and M226 rear axles, such as the Nissan Frontier, Xterra, and Titan. This modification helps prevent clogging issues that can lead to costly axle seal replacements. Additionally, we will cover how to check the differential fluid and inspect the axle seals for leaks.

Step 1: Gather Necessary Tools and Materials

Before starting the installation, ensure you have the following tools and materials:

• All Dogs Off Road Axle Breather or similar aftermarket breather
• 1/4" rubber gas line hose (8' - 10')
• 1/4" hose ID x 1/8" male BSPT barb fitting
• Stainless steel 5/8" adjustable clamp
• Plastic zip ties
• Basic hand tools (wrench, screwdriver, etc.)

Tip: Purchase high-quality components to ensure durability and longevity.

Step 2: Prepare the Vehicle

1. Lift the Vehicle:

   • Use a jack to lift the rear of the vehicle and secure it on jack stands for safety.

2. Locate the Differential:

   • Identify the rear differential and stock breather location.

Common Pitfall: Ensure the vehicle is on a level surface before lifting; this helps with fluid checks later.

Step 3: Remove the Stock Breather

1. Disconnect the Stock Breather:

   • Carefully remove the stock breather from the differential. This may require a wrench depending on how it’s secured.

2. Inspect for Damage:

   • Check the stock breather for signs of clogging or wear. If the breather is blocked, this may have contributed to axle seal issues.

Step 4: Install the Aftermarket Breather

1. Attach the Barb Fitting:

   • Connect the 1/8" male BSPT barb fitting to the aftermarket breather securely.

2. Connect the Rubber Hose:

   • Attach one end of the 1/4" rubber gas line hose to the barb fitting.

3. Extend the Hose:

   • Route the hose up towards the rear taillight area. This will help prevent water and debris from entering the breather during off-road driving.

4. Secure the Hose:

   • Use plastic zip ties to secure the hose along the way, ensuring it doesn’t hang or rub against any moving parts.

5. Clamp the Connection:

   • Use the stainless steel adjustable clamp to secure the connection between the hose and the breather.

Tip: Make sure the hose is not kinked or pinched to allow for proper airflow.

Step 5: Check the Differential Fluid

1. Locate the Fill Plug:

   • Find the differential fill plug on the side of the differential housing.

2. Remove the Fill Plug:

   • Use a wrench to carefully remove the fill plug.

3. Check Fluid Level:

   • Insert your finger into the fill hole. The fluid should be just below the fill plug opening. If it’s low, add the appropriate differential fluid until it reaches the correct level.

Real-World Application: Regularly checking your differential fluid can help prevent wear and tear in the drivetrain.

Step 6: Inspect for Leaks

1. Examine the Axle Seals:

   • Look around the axle seals for any signs of fluid leakage.

2. Test for Seepage:

   • Run your fingers along the seals and check for wetness or drips, which indicate a potential failure.

Tip: Address any leaks immediately to avoid further damage to the axle.

Conclusion

By following these steps, you can successfully install an aftermarket rear axle breather and check your differential fluid, which can save you from costly repairs down the road. Regular maintenance and modifications like this can greatly enhance your vehicle's performance and longevity, especially in off-road conditions. For ongoing vehicle care, consider establishing a routine check-up schedule for your differential fluid and seals.