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Front end noise, but not the hub bearing???

 
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Old 20 Oct 2014, 04:31 pm
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Default Front end noise, but not the hub bearing???

Ok, as the username shows, I'm new to the PT Cruisers. It actually belongs to my girlfriend.
I have searched the forum but can't find anything with my problem.
I have a pretty significant noise or "growling" coming from the front end when driving down the road. The pitch of the noise changes as you speed up and slow down. Can even change the tone of the sound by swaying back and forth on the road as you're driving. It gets louder when you slightly turn it to the right, and quieter when going left.
Now, I know what's going through your head, Duh, it's the hub bearing. Exactly what I thought. But, I put a brand new one in it, and it didn't change it at all!!!
Since it got louder when going to the right, I replaced the driver side bearing, Plus, the sound is towards the driver side.
I don't believe that it's the CV axle, because it was replaced about 25,000 miles ago with a good quality NAPA axle. And the axle appears in great shape no tears in the boots at all.
So my questions is, Has anyone ran into this before? Is the bearing on transmission side of the axle prone to going out? And if it is, How big of a job to replace it?
Thank you very much for any help with this question.
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Old 20 Oct 2014, 04:42 pm
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Default Re: Front end noise, but not the hub bearing???

You said you changed the hub bearing (what most of us call the wheel bearing) but from what I know, they should always be changed in pairs (both sides). Some would disagree, but you might have changed the wrong side.
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Old 20 Oct 2014, 04:42 pm
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Default Re: Front end noise, but not the hub bearing???

Sorry, forgot to include some key info in the original post.
The car is a 2003 PT Cruiser, Touring Edition , with an automatic transmission.
It has 130,000 miles on it.
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Old 20 Oct 2014, 04:48 pm
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Default Re: Front end noise, but not the hub bearing???

Thanks for the reply CREWZIN.
I have contemplated replacing the other side, but the noise truly seems to be towards the driver side.
I have been the driver and in the passenger seat, and definitely notice it more on the driver side.
And yes I mean the wheel bearing when I say hub bearing.
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Old 20 Oct 2014, 04:54 pm
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Default Re: Front end noise, but not the hub bearing???

Well, you've mentioned about the only things that would make a "growling" noise. Most places will let you get your PT up on a lift to help you find where the noise is coming from hoping to sell you parts to fix it but you not obligated to have it fixed there. The right lift will allow you to run the engine in gear and turn the wheels so hopefully the noise can be pinpointed.
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Old 20 Oct 2014, 05:06 pm
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Default Re: Front end noise, but not the hub bearing???

Well, I fortunately have a friend with a car lift that will let me do this.
I was just very curious if anyone else has had this issue.
And if it did turn out to be the bearing on the transmission side of the axle, how much of a job that would be to fix.
Thanks again.
If I do get it pinpointed, I will keep everyone posted on what I find.
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Old 26 Oct 2014, 11:27 pm
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Default Re: Front end noise, but not the hub bearing???

Ok, finally got the car up on the lift to really try and track down the noise.
Up on the lift, car running, and in drive, running about 25mph.
The "growling" or "grinding" noise seems to be right at the transmission, right where the passenger side cv axle comes out. Plus there is some wobble to that same cv axle at the transmission.
Now, someone please correct me if I'm wrong, but that seems to me to be the differential right behind there. So I think this means that the differential carrier bearing is what is making the noise.
Again, please tell me if I'm wrong, but it looks like I'm in for one heck of a job of pulling the trans to replace.
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Old 27 Oct 2014, 12:20 am
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Default Re: Front end noise, but not the hub bearing???

I found this differential thread on this forum.


Differential?
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Old 27 Oct 2014, 12:25 am
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Default Re: Front end noise, but not the hub bearing???

Quote:
Originally Posted by ptnoob1973 View Post
Ok, finally got the car up on the lift to really try and track down the noise.
Up on the lift, car running, and in drive, running about 25mph.
The "growling" or "grinding" noise seems to be right at the transmission, right where the passenger side cv axle comes out. Plus there is some wobble to that same cv axle at the transmission.
Now, someone please correct me if I'm wrong, but that seems to me to be the differential right behind there. So I think this means that the differential carrier bearing is what is making the noise.
Again, please tell me if I'm wrong, but it looks like I'm in for one heck of a job of pulling the trans to replace.
Do you have vibration along with the grinding sound at the same rpm's even as you go to 65 mph?
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Old 27 Oct 2014, 12:53 am
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Default Re: Front end noise, but not the hub bearing???

Yeah, I found the same differential thread on here after I located the noise.
It seems that it is the exact same problem.
Which makes me wonder how common this really is???

He does mention that the bearings are quite cheap, but doesn't mention if there is anyway this can be fixed without pulling the trans. I'm assuming that since he says he bought his wife a temporary ride while he fixes it, that he did have to take the tranny out.

As far as any vibration at speed, there really isn't any. You just notice the growl.
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