Buzzing in rear
#1
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I just woke uo this morning to take my wife to her training class and while I was driving my 04 S-Type V6, with 96k miles, began making a sort of humming or rattling noise. It is not a constant noise, more of a noise like when you go outof highway lanes and your tire is in the shoulder, like a buzzing noise. The noise seems to come from the rear of the vehicle. It had new tires and a balance done about 6k miles ago. I thought about it being a bearing but the noise would be constant. I also thought about it sounding like pressure release valve on the a/c compressor when you put to much free-on but it is coming from the rear. Sounds louder as the mph increase and is hear from 1.5 rpms to 2.5 rpms.
I'm thinking of rotating the tires later, if I don't get any suggestions I will got to mechanic shop and post results.
I'm thinking of rotating the tires later, if I don't get any suggestions I will got to mechanic shop and post results.
#2
#4
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Gas wise it has 3/4 of a tank and it never goes pas 1/2 before I fill it up again. As for the differential I really don't know if it was ever replaced but I have pick I would like to show you guys. I founda plastic piece, seal thing broken in th rear of driveshaft where it mets the differential I also found a couple of boots that where ripped I will upload pics.
rear seal of driveshaft
rear seal of driveshaft
![](https://i244.photobucket.com/albums/gg33/gonzalez1626/IMG_3884.jpg)
#7
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#8
#9
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yes it is where the drive shaft meets the differential.I actually just came back from the rotationand I noticed no change but I did notice that the rpms lower a bit when the noise starts. I shifted the engine to neutral and it doesn't do it in neutral, don't know if that helps but I think it eliminates the gas pump
#11
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Well I went for a drive and it sounds like a semi using air brakes but of course not that loud. I put in neutral and reved it to 4k rpms and it didn't make the sound I also was driving at 55 mph and also put it in neutral and the sound didn't come back until I put it in drive again I am going to leave at mechanic. I also drove it at wide open throttle and it reved to 6.5k rpm fine. Don't know what is up?
#12
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