I have a 2007 XLT 4x4, 2.5 AS in front and add-a-leaf in back. 55k miles on the clock. A couple months ago it developed a low-pitched hum/whine and slight vibration that appears at 30mph and 60mph, any other speeds it is undetectable to my ears. It seems more noticeable on deceleration, but that may be because I hear more exhaust on acceleration. Was told that it was the driver-side bearing, so I replaced the hub with a Timken. No change, noise is still there. I know the passenger-side CV boot is leaking, but it is still in pretty good shape. Any ideas? U-joint? Tranny?

I love my truck, but with 5k left on the warranty and 2 payments left, it seems like stuff is just starting to go. 2 out of 4 ball joints were shot at 50k (replaced all 4 w/ moog greasable joints). Now this. Ugh.

 

Anybody???

 

Still on warranty? Get EVERYTHING fixed or get rid of it.

 

I was thinking a u-joints, or maybe your tires need balancing.

 

Does sound typical of a tire balance issue to me.

 

Thanks for the responses. I will have the tires checked. I was going to bring it to the dealer just to have them look at it, maybe they can pinpoint what it is. I would love to get everything fixed under warranty, I have 5k miles or 5 months left on it, but I don't know what I can get them to fix. My guess is the CV boot isn't a warrantied item, especially with the AS level in the front, seems like the half-shaft would have to fail, even then they'd probably say the level caused it. Bearings aren't covered under powertrain as I understand it. If I could get the noise to go away and replace the leaky boot, I'd be more content with it.

 

Could be a wheel bearing

 

Good luck with that.

The 2.5" AS hasn't done the ball joints, CV boots, etc any favours. I dunno what the warranty will cover if they implicate that mod.

There still may be crud in the CV with the torn boot....

Good luck.

MGD