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Discussion Starter #1
Hi All,
my AU2 (beam axle) has developed a whine noise at 65000k's. Hard to detect from where but driving me nuts even with radio turned up. It mainly occurs at 40-70 k's have put it in third, neutral, still there. Jacked it up from the diff and ran it to 80 k's freewheeling and can't here it maybe it is a wheel bearing or just needs load up on back wheels before it is evident. Someone suggested the 16 inch tyres (Goodyear NCT5) could be the culprit, Maybe I should swap them with a known quiet car to possibly eliminate this scenario - any suggestions or similar experiences would be appreciated.
 

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Once you are sure its not the tyres, drive it at 60kph and swerve from side to side fairly violently. If the noise changes its probably rear wheel bearings. If the noise is louder when turning left, its the rhs, and vice versa. If the noise stays the same during turning I would suspect its diff carrier bearings. Had a few of these fail in this model.
 

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Discussion Starter #3
Yeah, thanks smally351, tried the swerve amounst the testing and yes it is louder swerving right and almost disappears swerving left. Thing is for me it is hard to tell if it is a front or rear bearing if thats the case. Had both front wheels off and there is no stiffness in the hubs and they rotate freely mmmm probably is the rear.
 

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Front hubs are sealed and you cant pull em apart to check the bearings, whereas the rear ones are simple to rip out and check. The other way to do it is find a workshop with an old on car wheel balancer and spin up the front wheels one at a time and listen for the noise.
 

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Discussion Starter #5
Thanks, very good idea smally351, will sus out the on car wheel balancer.

My brother thinks i am too fussy with cars and to just get over it. The slight whine is like chinese water toture i reckon.
 

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Discussion Starter #6
I solved the problem. Tyres. As suggested they were the problem. Inside edge was scalloped and causing the noise. Goodyear NCT5's. Only 50% worn however the tyre guy at Total Tyres replaced them and good as gold! I dont know how they became scalloped as the car has a beam axle with no adjustment. The front has had an alignment and whether this had anything to do with it, I dont know.

I read another thread where the guy had a BA back to Ford several times they ended up re building his diff only to find out it was also the tyres!
 

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Discussion Starter #8
Yes, you are right all the way smally351, your opening comment said, "once you have checked the tyres....." say no more. Thanks
 

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I know its not my tires here but i can see my hangar bearing sway and roll around inside the support in the center of the truck. I had a driver roll it back and forth slowly and saw that bearing almost falling out on me... where do i get one.. no one seems to have it.. BTW Does anyone know where I can get the FSM for the 2007 f150 STX with the 4.6 ltr.
 

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You might want to make your own thread as this one is 13 years old and I doubt you’ll get an answer. And please do not bump old threads as it clutters the forum and if someone searches for the same problem you are having they will not find it in a thread about something different. Thank you!
 
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