Differential Breather Kit Install 5th Gen 4Runner

 In 5th Gen 4Runner Mods, Aftermarket Install, SR5 4Runner Mods, T4R Accessories

Rear Differential Breather Kit Install 5th Gen 4Runner

ARB Differential Breather Kit 5th Gen 4Runner

5th Gen 4Runner Rear Differential Breather Kit Benefits, Install, Overview and Review

What is a Rear Differential Breather?

A Differential Breather Kit prevents water from getting into your drivetrain when you are taking your 4×4 through water crossings. Any diff breather kit is made up of 6-8mm tubing that connects the rear axle, differentials, transmission, and transfer case to a higher location mounted on your 4Runner. When hot, differentials, transmissions and the transfer case will heat up serving the need to vent.

When cold, these components contract which creates a vacuum of air. When you are going to a creek or crossing a river, things cool down, which means you are likely to suck in that cold water. This cold water will eventually mix with your differential, transmission or transfer case oil and fluids with the potential of causing serious problems to your 4Runner’s drivetrain or lockers.

When we take our 4Runners through a water crossing, we are risking the drivetrain with the possibility of letting water mix with the drivetrain oil. If you go through a set or series of creeks, you will eventually go deep enough to where this will be an issue. With a big enough 5th Gen 4Runner suspension system or 4Runner lift kit, you can prevent this but it is always nice to have one just in case.

Different Types of Differential Kits and DIY Differential Kits

ARB Differential Breather Kit 5th Gen 4Runner

Every differential breather kit is essentially the same, and most of these DIY parts can be purchased from 4x4parts.com and other 4×4/ off-road websites. But, we wanted to make our life a little easier and grab a name-brand, well-trusted and widely used differential kit that was made specifically for our 5th Gen 4Runners.

This Differential Breather Kit is a pre-packaged kit for your 5th Gen 4Runner that will give you everything you need. The ARB Differential Breather Kit is a direct replacement for your OE differential breather. The OE differential breather on our 5th Gen 4Runner is a short mounted assembly with a one-way steel valve. The problem with this valve is that it’s just short and stubby which opens up room for you having to drain your diff fluid later. Which no one wants to so.

By installing a differential breather kit, we will prevent water from entering our differential which will cause fewer headaches down the road. There are many 5th Gen 4Runner owners out there who say you don’t need one and others who wish they had installed one. So, the choice is your’s but we highly recommend installing one if you are ever going to be out in the middle of nowhere crossing creeks and rivers.

Rear Differential Breather Kit Installation

ARB Differential Breather Kit 5th Gen 4Runner

Tools for Differential Breather Kit Install:

  • ARB Breather Install Kit (Part #170112)
  • Phillips Screwdriver
  • 14 mm or adjustable wrench
  • Cordless Drill (if mounting with self-tapping screws included in kit)
  • Pocket Knife/Utility Knife
  • Wire Cutters

Differential Breather Kit Install Time:

  • 1 – 2 Hours

Whats In the Box?

  • Anodized Aluminium Manifold
  • 4 x BSP ports for breather lines
  • 1 x NPT ports for air filter
  • Air filter assembly
  • 4 x push-in fittings
  • 3 x BSP plugs for plugging unused ports
  • 8m x 8mm polyethylene tubing
  • 2 x self-tapping screws
  • 25 x cable ties

Diff Install Step #1:

Install Coming Soon…

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