Front Diff and Trans breather location?

I relocated the rear diff breather and was wondering if anyone knows where our front diff and Trans breathers are located. In the FJ they are in the engine bay and pretty easy to locate. The 1st Gen. Tundra vented both in the engine bay as well. I can't find 'em in my truck.

 

I could have sworn they were also in the engine bay, but maybe im thinking of my tacoma. Ill have to take a look now.

 

They likely are, but they were not as obvious as they are on the FJ, so I didn't see them. I'll take a better look. In the mean time, if you find 'em, holler.

 

Good job dude

 

Awesome! I'm going out to look right now. Thanks for looking and posting up.

 

They sure weren't very obvious. Thanks again. I think they're high enough that I don't have to mod them like I did with the rear.

 

I *try not to go in water deeper than the frame. The rear diff breather wasn't well placed for that.

 

From everything I've read and discussed with some buddies, you're correct with how the water would get in. How much would get in? I don't honestly know. But it would seem anything other than condensation would be bad.

How frequently do you change your diff oil or transfer case oil? I use Mobil 1 synthetic gear oil and I go about 30k between changes. Honestly, the transfer case always looks clean. The rear gets pretty dirty and the front not so much. My previous two Toyota 4x4s have always had really clean xfer case oil too. Not sure why but it seems to be a Toyota trait.

 

I know this is an old post, but maybe someone can answer a question...
Yeah, the front diff breather seems to be high up in the engine bay, but is it a ONE WAY breather? If it is like the rear where air can only get out, not in, then shouldn't the cab be removed and a small filter put on the end?

 

the rear diff I believe is a 2 way breather.. how it works is if the rear is hot enough, hot air gets pushed up and out and if that happens while youre sitting in the water the blow off will cause a suction effect and that's how the water gets in. ive had one of those little diff breather balloon where its basically a one way balloon and it expanded significantly pretty big.

 

They are one-way in a sense that full hot to cold water will cause a immediate suction/vacuum that has to come from somewhere. Either through the seals and bearings or aftermarket two-way breathers.
The OEM only allows out flow to keep water out. When changing diff fluid at normal temps you usually will notice a slight suction when you open the top or bottom .
This applies to all diffs , transfer case and transmission.

 

very nice picture,show a location of diff and Trans breathers

 

https://youtu.be/gyteuG5NbEs

Step by step video

 

Hi all! I'm new here.

I have a 2003 Sequoia. I've been working in Wyoming for a couple weeks and the temperature is in the teens and 20's. When I got home I found a fair amount of oil on my garage floor. From what I can tell the oil seems to be coming from the breather hoses pictured in post #3. Since the hoses are next to each other I'm not sure which one the oil is coming out of.

Background. I had front and rear differential and transfer case oil changed about 5 months ago (August). Afterwards there was minor dripping from the front axle area. The shop checked to make sure the drain plug was tight and they said the right side axle seal on the front end was leaking. I haven't had that fixed yet but very little oil appeared to leak. I don't use 4x4 often but I did use it in the snow a little over a week ago.

Any idea what would cause that to happen?

Thanks!

 

Sam

Same boat but oil coming out of the smaller of the two lines, looks like brake fluid???

 

Sorry for reviving this old thread but isnt one of the breathers pretty low? (correct me if im wrong). The breathers in the engine bay are the transfer case and the front differential correct? What about the transmission breather? OP mentioned the FJ, which does have them high up in the engine bay as well for the transfer case and front diff, but the FJ (at least my 07) has a Transmission breather thats literally on top of the bell housing (pretty stupid design). Additionally, its one of those flimsy POS check valves. I didnt trust it one little bit so i routed the transmission breather way up high with the other ones.

Does anyone know where the transmission breather is on the Tundras? Im gonna dive under my 2020 this coming week when i do all of my fluids and check things out.

 

I was also wondering the same question. Where are the transmission and transfer case breathers.

 

I still don’t have an answer for the transmission breather. All the other ones are up high enough that i think you’d be fine unless you do some very deep crossings. Of course the rear is low but that’s a quick fix. Only transmission one remains a mystery.

 

I just found it. Looks like maybe two breather hoses. Impossible to get to looks like unless you drop the trans.