Finally extended my breathers
- Thread starter willbt
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Not for me, that is the same way ARB had designed their breather.
Do you mean having them merge together on their way to the engine compartment, ending up with a single tube and breather element? If so, I've been thinking about that too.
I would guess that the volume and rate of exchanged air is low enough that a single 1/4" ID tube would suffice. The breathers are to prevent build up of pressure that could push oil past a seal.
If the breathers are merged then a blocked or pinched tube will effect all downstream chambers. I guess you just have to decide for yourself the likelihood of that happening. I'm still working it out...
Sorry I think I misunderstood. ARB has multiple hoses connecting to 1 filter. Not multiple tubes connecting to a single tube.
Yeah I would agree with @Ayune. In theory what you said seems fine because it’s a low volume application but there is always the possibility of something going wrong if tubes/filters get blocked.
That's a super comprehensive diy! This may sound like a dumb question but how in the world do you even access the front diff vent tube without removing the steering rack? Any help would be greatly appreciated as to where you get to it. I can see it part of it from the passenger side engine bay, top looking down, then the line disappears under the engine. When I look from the bottom, all I see is the steering rack. Thx in advance!
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- #26
@Albertucsb88 Pull your air box assembly and stand on your tire. You'll be able to reach down in there
Thanks so much! Got it, I think the diff tube got pulled off the diff housing when we replaced the steering rack. I assume I can get to it as well if I remove the airbox assembly. You guys are great.
I took a look and it taking the airbox assembly will give me more access to remove the breather tube, but to get to the line that attaches to the diff assembly seems like there is no easy solution. Any help would be greatly appreciated! Thx
mdcoa
SILVER Star
Just knocked this out tonight--thanks for the writeup. My '04 doesn't have a transmission dipstick, but the tranny and t-case breathers terminate at two u-shaped fittings at the left (driver's side here in the U.S.) rear of the engine and were pretty easy to trace back to their origins from there.
Front diff breather was pretty easy. Found it from beneath, with the splash pan dropped, but could NOT get to it for removal or replacement. So tried from above, and it was really easy to reach from above, without removing the airbox or anything. Used needle-nosed pliers to 1) rotate and 2) loosen the spring clamp on it, then pulled it off and replaced with 1/4" hose and hose clamp.
Now just need to top all three lines off with fuel filters . . .
Front diff breather was pretty easy. Found it from beneath, with the splash pan dropped, but could NOT get to it for removal or replacement. So tried from above, and it was really easy to reach from above, without removing the airbox or anything. Used needle-nosed pliers to 1) rotate and 2) loosen the spring clamp on it, then pulled it off and replaced with 1/4" hose and hose clamp.
Now just need to top all three lines off with fuel filters . . .
Great Wright up
I’m going for it
I’m going to make one modification to mine
Might be over kill
Where I zip tie the breather hose to the frame or ????? I’m going to place the hose in a section of 1” ID tube just to make sure it doesn’t get crimped somehow and blow a seal
I’m sure it’s fine but with all the twisting and bouncing around it would give me more piece of mind
I’m going for it
I’m going to make one modification to mine
Might be over kill
Where I zip tie the breather hose to the frame or ????? I’m going to place the hose in a section of 1” ID tube just to make sure it doesn’t get crimped somehow and blow a seal
I’m sure it’s fine but with all the twisting and bouncing around it would give me more piece of mind
trdcorolla
SILVER Star
Gonna order the parts to do this. I'm probably going to do a separate filter for each one. I'm going to route the rear diff breather to the driver side rear tail light like some have done. I was thinking hose clamp screwed down with self tapping screws. What self tapping screws should I buy? Coated to prevent rust?
correct me if im wrong, but the front diff and transfer case ended on the dip stick, which was plenty high (i think), so I just ran a long hose from the rear diff which ended up zip tied to the dip stick.
trdcorolla
SILVER Star
I read they connect to the bottom of the dipstick but they vent to the atmosphere, it doesn't vent into the dipstick itself. Some here don't extend these if they think they are high enough for their use.
This is awesome! Thanks so much for posting this with the detail+photos, just starting this project myself.
Thanks for taking the time to post. Great detailed photos help a lot. I've done the F&R diffs a while back but could not figure out how to access the transmission and transfer case breathers. Specially the transmission nipple which being plastic, I didn't feel comfortable just feeling around and pulling on blindly. Your photos help immensely and I'll probably look into extending tranny & transfer case now that I know where (what) to look. That being said, FWIW, on our several Houston floods I've had to ford water deeper than my headlights for at least a couple of blocks. Some times (short distances) even a little over the hood. Before extending the F&R diff breathers, water got inside the front diff only (even on shallow water crossings like the various streams you cross in the San Juan Mountains in CO, front diff would get water, rear diff no problems)... After extending the diffs, I have not gotten water in transmission or transfer case, even with water above the headlights for a couple several hundred yards.
trdcorolla
SILVER Star
Extended my front diff breather. Was looking at extending the rear diff breather behind the rear tail light but I didn't see how you guys who did it this way got the hose to drop down under the car. I removed the driver side tail light and couldn't get the hose under the car. Did you guys mean you mounted the breather behind the rear tail light on the interior behind the plastic panels? Now i'm thinking to extend it right behind the gas cap, that looks like an easy constant rise path if I zip tie the hose to the gas line above the spare and just follow it up behind the gas cap. I'll have to remove the spare and the wheel well insert hiding the gas line. Sorry, i'm probably over thinking this.
I didn't want to drill or take apart anything, so I extended the rear breather to right behind the refuelling door. It's at about bonnet height, so should be enough as the front diff and trans breathers are also at that height anyway.
I did the front and rear diff but here is what I have left for the transmission and transfer case, they terminate here at the firewall. Did you guys extend these? If so, how? I would like to access them here as it seems easiest, it is pretty hard to access things on top of the tranny and t-case.
