not on mine i know the ones your talking about sorda a steal braded line and then goes into the wheel houseing.lol. these ones actually end were they are on the axle like i say about 4 inchs from the center of the axle ill have to take a picture or something hard to explain.

 

My guess is that is your breather tube. The breather tube is what allows the differentil to breath as the air expands and contracts with temperature change.

 

i dont believe so it very well mybe be but i dont think so it.shouldnt the breather house be located up top center of the axle.i feel like im saying center alot.lol.reminding me ishould fix my over flow on the transmission damn thing.

 

No, not neccessarily. If you've ever looked inside the axle assembly, its all open except for the axle seals at each hub, so the air can expand and contract throughout the entire assembly, since the ABS sensor setup needs to be on top of the differential, it makes sense to move the breather tube out of the way.

 

okay mybad i looked closer and the part on the side that is bolted its apart of the abs.idk what i was thinking about haha ooops

ya i actually had my dif appart i was supprized at how well itstill was absolutly no wear very suprizing to me.although i did have toreplace the bearings at the end of the axle on both sides. man those things can be a piecs to get out.easy to go in though.