roaring sound coming from rear end


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roaring sound coming from rear end

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dog_4003
User

Feb 21, 2011, 3:17 PM

Post #1 of 6 (7777 views)

roaring sound coming from rear end	Sign In

got a 1996 chevy silverado truck 5.7 liter engine 2 wd 207,000 miles. its making a roaring noise when you go down the road when you get up to abought 30 miles an hour is when you hear it. im shure its coming from the rear end. i took it to service shop the oiled the rearend they said it was abought a quart low. but still makes the noise. i was woundering 3 things. 1 could that even be the rearend or something else. 2 i know there are rear wheel bearings and things there are there any grease fittings on there where you can grease them rear bearings. thanks for any help.

zmame
Veteran / Moderator
zmame profile image

Feb 21, 2011, 3:40 PM

Post #2 of 6 (7775 views)

Re: roaring sound coming from rear end	Sign In

if you were down 1L I would be wondering where it went. Check your axle seals rear pinion seal for leaks. If there are leaks check your vent tube make sure it's not blocked causing excess pressure in the rear end. If you where low on fluid it's possible you could have starved a bearing of oil causing it to overhead and fail.

best thing to do is bring it to a garage and get it on a hoist so they can run it up in the air to pin-point the noise.

way2old
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way2old profile image

Feb 21, 2011, 5:14 PM

Post #3 of 6 (7771 views)

Re: roaring sound coming from rear end	Sign In

Also the oil in the rear end is what lubricates the bearings. There is no external way to lube them.

Being way2old is why I need help from younger minds

dog_4003
User

Feb 21, 2011, 10:20 PM

Post #4 of 6 (7765 views)

Re: roaring sound coming from rear end	Sign In

ok ill check it any idea where its located at thanks

dog_4003
User

Feb 21, 2011, 10:49 PM

Post #5 of 6 (7763 views)

Re: roaring sound coming from rear end	Sign In

ok found the vent tube its located on the case of the differentral it has a rubber hose running off of it so now my question is how do you clean them to make shure its not blocked do you remove them stick a small screwdriver down it or what if removal is nessacery what do you clean it with. how do you remove it does it screw out or what. thanks for all the help

zmame
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zmame profile image

Feb 22, 2011, 3:49 PM

Post #6 of 6 (7756 views)

Re: roaring sound coming from rear end	Sign In

Usally you remove the tube and blow through it if its blocked use air gun to blow it out. I'm not sure on GM if the nipple threads out or not it should. if not take fill plug out blow though with the one end of the hose to see if it's free.

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