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Old 06-23-2014, 11:07 PM
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Does my jeep have a rear diff breather?

I easily found the front diff breather tune but I can't find the rear. Do 3.07 rear ends not have a breather?

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Old 06-23-2014, 11:20 PM   #2
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You should have a vent tube. Where the brake line TEE is mounted to the axle tube, just to the drivers side of the differential housing, it has a built in vent nipple and should have a rubber hose that if you follow it, goes up behind the left rear well where the gas filler is and should be tied off up high near the gas fill. I'm not sure how it mounts from the factory but mine fell down one time and I took on water in a crossing on a wheeling trip. Have since, tied it back up to the vent tube on the gas filler neck.

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Old 06-23-2014, 11:29 PM   #3
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all differentials have breathers. Without the seals would probably blow out or at least leak. Some one on this forum will probably crawl under theirs and look/let you know where it is located if you provide some info. Yr. model? rear end# 35? 44? 3.07 is ratio, not axle type.
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Old 06-23-2014, 11:30 PM
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Quote:
Originally Posted by DoubleOught View Post
You should have a vent tube. Where the brake line TEE is mounted to the axle tube, just to the drivers side of the differential housing, it has a built in vent nipple and should have a rubber hose that if you follow it, goes up behind the left rear well where the gas filler is and should be tied off up high near the gas fill. I'm not sure how it mounts from the factory but mine fell down one time and I took on water in a crossing on a wheeling trip. Have since, tied it back up to the vent tube on the gas filler neck.
thanks I will look again
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Old 06-23-2014, 11:31 PM
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Originally Posted by kawzak View Post
all differentials have breathers. Without the seals would probably blow out or at least leak. Some one on this forum will probably crawl under theirs and look/let you know where it is located if you provide some info. Yr. model? rear end# 35? 44? 3.07 is ratio, not axle type.
03 d35
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Old 06-23-2014, 11:43 PM
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Originally Posted by DoubleOught View Post
You should have a vent tube. Where the brake line TEE is mounted to the axle tube, just to the drivers side of the differential housing, it has a built in vent nipple and should have a rubber hose that if you follow it, goes up behind the left rear well where the gas filler is and should be tied off up high near the gas fill. I'm not sure how it mounts from the factory but mine fell down one time and I took on water in a crossing on a wheeling trip. Have since, tied it back up to the vent tube on the gas filler neck.
you win. I would have never expected to find it there. I was looking on the pumpkin not the axle. Thanks for the help
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Old 06-24-2014, 12:43 PM   #7
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No problem, I am also used to seeing it in the cast housing on most trucks but have seen it on the axle tube on cars. If I recall correctly, the only D44 I've worked on in an LJ had the same setup as the D35s in TJs. On the front D30, it is in the top of the housing but points to the rear instead of directly up.

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