I got a loud high pitch whine only when i get above 15-20 mph.

Ive replaced all 3 idlers, tensioner pulley, power steering pump and pulley as well as my left wheel bearing.

No one seems to know where it is coming From. Has anyone else had this problem or know what it is?!?

2006 f150 5.4 XLT

 

Alternator

 

The pulley or hole thing?

 

The actual alternator

 

The rear bearing in our alternators are prone to whining. Especially in cold weather. It's annoying. U could pull it and take it to a builder and have the bearings changed.

 

do this ^^^^^

 

Just went to advanced this morning and bought a whole new alternator, which after pulling mine out it had a few serious cracks it was about to fall apart.

Any who the noise is still there, I will upload a video of the sound if I can get it on video.

Any more thoughts!

 

Did you buy a new or a reman alternator? If reman then it's likely bad right out of the box. Might be a good idea to get a stethoscope so you can more accurately pinpoint where the noise is coming from.

 

The problem is only while driving when I revive it up in park or natural. There is no whine until I hit 15-20 mph

 

Bought a new one