Humming noise out the rear of car when driving 30+

[Big Bald]

I want to say its my wheel bearing but i am new to AWD. Anyone else experience this and what other ways will i know if it is a wheel bearing? I don't know if tires can actually be that loud when driving but on another car when the bearing went, it made a loud humming noise. Thanks in advance for any assistance.

 

[Coldandafraid]

jack the car and see if you have any wheel play up and down.

 

[Big Bald]

thanks i will check that out today.......

 

[leet]

Does the rear end of the car shake and grind when you accelerate? How many miles on the transmission?

 

[Big Bald]

140k on the car in total.......

 

[Big Bald]

Well i found out that both of my rear tires need hub assemblies cause they are loose. They say it is a bolt on job which i take to mean i can do this myself but the parts are $175 a piece. Has this happened to anyone else yet and can i find these parts anywhere cheaper?

 

[Morphius]

Originally posted by Big Bald
Well i found out that both of my rear tires need hub assemblies cause they are loose. They say it is a bolt on job which i take to mean i can do this myself but the parts are $175 a piece. Has this happened to anyone else yet and can i find these parts anywhere cheaper?

I'm not that familiar with 2G's...... are the bushings bad on the hub assemblies? Or is it a bearing? If it's a bearing, go to a buisness that sells Bearings. Pop your's out and take it with you, they;ll measure it and find one that fits exaclty. ALOT cheaper than going to the dealer. Or try an autoparts store for the bearing.

 

[theTuner]

Sounds like your rear differential is shot. Does it get very bad on the highway? Like a drowning noise? My friend had this problem for a long time and drove with it for along time too, he ended up getting a OEM LSD. This is what i think your problem is.

 

[Big Bald]

both wheel assemblies are loose and on the 2g the bearing doesn't pop out per say. I found them for $120 a piece which seems to be the cheapest i can find.

Sounds like your rear differential is shot. Does it get very bad on the highway? Like a drowning noise? My friend had this problem for a long time and drove with it for along time too, he ended up getting a OEM LSD. This is what i think your problem is.

I want to say yes but it is just as bad in the street. I am also getting a knocking noise while driving. Would the rear diff cause theses problems?

 

[Andydg]

I have a very similar problem. When I drive at 30+ you hear a humming noise, and when I take a right hand curve it gets much worse.

 

[theTuner]

hrmm doesnt seem like its your rear diff then, if it was your diff then it would get progressivly louder as your mph increases

 

[ASZRAEL1266]

i have the same problem Mine is at about 45 there is a humming noise. When i slow down like at 10mph to a full stop i can hear the humming noise get quiter. Its kinda like hearing the drive shaft spin and slowing down as you do, but when i give my car gas the sound it gone. I also get like a rubbing noise when i stay at one speed like if i keep it at 35 or 25 but if i let off the gas the noise is gone or if i give it gas the noise is gone In the next 2 weeks i am going to take my 4 bolt rear out and put in another 4 bolt rear to see if that is the problem

 

[casperfast]

i have a 95 tsi, just last night i was driving it and i had to slam on the breakes real hard. sfter that i have a humming sound coming from the rear end which increases with speed. and engine rpm doesnt afect it. you said it might be the diff, how can i diagnose it?