View Full Version : diff breathers - are they needed
big red beast
19-12-2002, 12:02 PM
i was just reading a back issue on 4wd monthly and it speaks of diff breathers and gearbox breathers, i have also come across this a few times. in this particular issue it shows you how to extend them to up in your bonnet.
so tell me are they needed in a Tj wrangler?
who runs them at present? who's had problems not running them?
why or why not?
you guys know the drill i need info and someone here is always knowledgable to ahve some.
oh and a merry xmas everyone!!! so when is everyone heading out i got my lift im dying to getvout and get muddy
19-12-2002, 12:10 PM
The TJ already has diff breathers mate. Look next to your radiator overflow bottle for a black rubber tube, follow it back and you'll see it ends up on the axle tube passenger side front. And the back one follows the fuel filler tube.
19-12-2002, 12:26 PM
BRB, if you don't drive through creek crossings with hot diffs then you probably wouldn't miss them. The breather allows the diff to suck clean air when the water causes the diffs to cool, reducing the air pressure inside the diff. Else you would suck water and turn your diff oil to milk and have to change it pretty soon after. Probably the article said all that...
19-12-2002, 01:18 PM
Hmmm, that reminds me...we gotta fit some breathers to JimnyJeep's Jimny...
big red beast
19-12-2002, 07:43 PM
crazy wasnt sure that they did but i was guessing so since no-one has mentioned them for jeeps in the past.
19-12-2002, 09:17 PM
Are you familiar with the t/case & tranny breathers too ;)
20-12-2002, 01:46 PM
21-12-2002, 12:40 PM
what they said. I'd play it by ear (but the tune can be terrible) it all depends on your type of wheeling, and where you go.
BTW I'm no help today, I'm just happy to be back. smile.gif
26-01-2003, 12:25 AM
They are OE on your TJ as well as those for the tCase & gearbox. For serious water you will need to extend them.
26-01-2003, 10:04 AM
I have them all extended to the top of the firewall terminating at a couple of fuel fliters. That is the front and rear axles, auto, transfercase and the distributor.
There is a photo on my site on the exterior ideas page.
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