Re: [tech] Strange driveline sounds

["Chris DeLong" <green536@hotmail.com>]

My guess is one or more bad front wheel bearings. Check your axle nuts to be 
sure they are very tight. You could also jack the car up and start it then 
put it into 5th and let the clutch out (BE SURE BOTH WHEELS ARE OFF THE 
GROUND AND YOU HAVE GOOD JACKSTANDS UNDER THE CAR). Then place your hand on 
each front spring while the wheels are spinning. If you feel any vibration 
then whichever spring vibrates is the one with the bad bearing. Sorry for 
the run-on sentence.

>
>Ever since I started driving my 86 8v, I have heard the same low pitched
>grinding noise coming from someplace between the tranny case and the tires.
>It starts at about 20mph, and continues until the wind drowns it out at 
>about
>85-90mph.  It has not changed in 4 months, does not change under load, or
>cornering, or stopping.  It used to pulsate at about 3-4Hz, but it does not
>seem to do this anymore, just a low hum.
>Could it be an inner CV joint?  No boots are ripped.
>Wheel bearing?  It does not change while cornering.
>Brakes?  Stuck caliper?  The brakes on the car have not been replaced, but
>visual exams and disassembly have not revealed anything unusual.
>
>If this were the summer, I probably would not fix it until it breaks (if
>ever).  However I require this car to perform at high sustained highway
>speeds (70-90 for 7 to 10 hours), and deep snow, and I do not want to get
>stranded someplace in the absolute wilderness!!!
>
>Thanks for any ideas
>Ben
>86 8v
>
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Chris DeLong
ICQ#45030867
Seattle, WA USA
'80 16V Rag
'88 16V Rocco (for sale!)
'82 GLI
'80 'Vert (for sale real cheap!)
'65 Bus (for sale!)
'61 17 Window


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