2003 Pontiac Montana 6 cyl Front Wheel Drive Automatic 99,000 miles
whirring noise heard suddenly at 60mph. Sounds lower pitch as I slow down and higher as I speed up, dissappears at 5-10 mph. Does not change if I put in neutral at 60mph or if I turn engine off at 60mph, does not change if brakes are applied, Maybe changes slightly at a curve at 60 mph. Might be coming from front right wheel area, cant hear it when sitting still and race engine. I think this is either a wheel bearing or cv joint. How can I diagnose which it is, or is there another possibility?
Your wheel bearing thought is right on so lets test it get vehicle up to speed so can hear noise now slightly turn wheel to left noise get louder now to right any change?If turn left and noise stops then left bearing right stops then right bearing.
Let me know
Thanks for donate
October, 15, 2010 AT 12:00 PM
The noise is pretty constant when I am turning, the pitch of the noise changes slightly but it is just as loud when turning left or right.
Is there another way to diagnose the bearing?
Are you ruling out the cv joint?
October, 15, 2010 AT 1:14 PM
CV generaly make clacking sound you can use a mechanics stethascope jack up on stands and run then use scope to find noise. Maybe a trans output bearing with no change while turning