Rear Diff Breather Mod

[cj80cruiser]

I followed most of the instructions from this link:
4Runners.org - Type R Rear Differential

But was curious as to the possible advantage of installing the breather in the filler neck gasket. I'm not too keen on the look of it sticking out there so I security tied my breather as high up on the filler neck behind the plastic shroud as possible. Also twisted a loop in the hose just above the axle to give it more room for movement so hose wouldn't get pulled off the nipple (threaded union)

Which way did you go?

 

[Nelsonmd]

I did it like that link did it. I think the reason for it is that it is a high spot, relatively clean (doesn't get splashed), and accessible. Some guys have run it inside the cab, which is fine too.

Personally, I don't care about it coming out the filler neck gasket. I never even noticed it when filling and I don't see a problem with it. I ran my diff-lock breather up there too. Both are very out of the way, and stay clean.

 

[J.A.]

Which way did you go?

Same way you did, behind the gasket. Toyota 4Runner Highlander Extended Rear Differential Breather

 

[4-Ripcord]

x3, just behind it. Didnt like the look of it going through the gasket.

 

[cj80cruiser]

I ran my diff-lock breather up there too. Both are very out of the way, and stay clean.

I didn't think about that. Have any pics of what you did?

 

[Nelsonmd]

I didn't think about that. Have any pics of what you did?

Not available. I could take one tonight, but there really isn't much to it. Check out my build thread. I have a pic I took right after taking off the filler neck gasket. There is a ton of sand and crap right behind the gasket, so pushing it through the gasket does make a big difference in how dirty it gets.

I didn't have the breather tube piped up there at the time I took that pic though.

 

[cj80cruiser]

Not available. I could take one tonight, but there really isn't much to it. Check out my build thread. I have a pic I took right after taking off the filler neck gasket. There is a ton of sand and crap right behind the gasket, so pushing it through the gasket does make a big difference in how dirty it gets.

I didn't have the breather tube piped up there at the time I took that pic though.

I'll just look at mine and hopefully I have some tubing laying around the house I can steal off some other project.

 

[Nelsonmd]

I'll just look at mine and hopefully I have some tubing laying around the house I can steal off some other project.

Yeah, I just bought some vacuum tubing and adapters from autozone and extended it up there. It's just as easy as the diff extension, cost about $5.

 

[habanero]

I started out with mine high up on the filler neck but it got too crudded up there so now it's through the gasket. Much cleaner.

 

[K.C.]

Some people have it in their jack/lug wrench compartment

 

[NOT ME OR SOMEBODY]

http://www.toyota-4runner.org/3rd-g...erential-breather-valve-pressure-buildup.html

I ran mine up under the hood (drivers side wheel well)

I'd have some concerns about gear oil odors inside the cab when running it into the interior.

 

[Scramble]

More info:

http://www.toyota-4runner.org/off-roading/123-breather-install.html

 

[mtbtim]

I just did this mod on my truck. Here's a video on how I did it. I basically followed what others have done in the past.

<iframe width="560" height="315" src="https://www.youtube.com/embed/tCGMa4vng_g" frameborder="0" allowfullscreen></iframe>

 

[Scramble]

I did mine last week, it was quicker than changing the oil. Easiest MOD ever.

 

[Clayton74]

I ran mine up inside the rear pillar. Definitely no gear oil odors and frankly gas cap level isn't high enough to keep mine out of the water!

 

[Myrunr2010]

I ran mine up inside the rear pillar. Definitely no gear oil odors and frankly gas cap level isn't high enough to keep mine out of the water!

If your gas cap isnt high enough then you may want to check your front diff and transmission. Both of those breather valves are lower than your gas cap.

 

[RunnerLimited]

Do you guys ever get the problem of the breather hose getting to close to the exhaust? Ive had to do mine twice now since it got to close and melted a part of it

 

[mtbtim]

Do you guys ever get the problem of the breather hose getting to close to the exhaust? Ive had to do mine twice now since it got to close and melted a part of it

Where are you running your extended breather? The exhaust is on the passenger side of the vehicle and the gas fill tube is on the driver side of the vehicle. I reckon you're not running it up the gas fill tube if it's getting close to the exhaust.

 

[RunnerLimited]

Where are you running your extended breather? The exhaust is on the passenger side of the vehicle and the gas fill tube is on the driver side of the vehicle. I reckon you're not running it up the gas fill tube if it's getting close to the exhaust.

Yeah i Run it through the Gas fill tube, its weird i guess i just have to arrange the slack to face away from the exhaust. Its happened twice now

 

[mtbtim]

Yeah i Run it through the Gas fill tube, its weird i guess i just have to arrange the slack to face away from the exhaust. Its happened twice now

With the way I ran mine, I don't think it would ever come close to the exhaust. But, I used a lot of zip ties to hold it in place where I wanted. I have an extra loop of slack for axle articulation and in the case I drop the axle down to replace springs, but even with that extra loop, it won't come near the exhaust. Maybe take a look at the video I made to see how I ran mine.