I have a '06 XC90 V8 AWD with approx 52k miles. Over the past 6 months, I've noticed a humming sound that gets louder the faster I drive. I believe it's the tranny or transfer case, but that's my dime store opinion.

I've had no warning lights or error messages from the OBC. That said, I've seen quite a few threads on here about faulty trannys and bearings. Those problems all appear to be older model T6's, so I don't know what to think.

The dealership isn't helping - they're calling it normal wear and tear.

So a few questions:

1) Has anyone else experienced this problem with a V8?
2) How much was the repair?
3) Should I re-up for my now-expired warranty?
3a) Can you recommend an aftermarket warranty vendor - Volvo wants $6400 for a 48mo/100k mi ($250 deductible) for an Easy Care warranty

Thank you.
DH

 

its not when you slow down correct? the faster, foot on gas, the louder?

 

Sorry for the ambiguity. It's not road noise, it's a mechanical sound. I just want to make sure it's not my tranny or transfer case dying a slow death. From reading this forum, it appears there's a history of tranny issues (albeit with the T-6, not the V8).

Has anyone else experienced this?

 

I have only heard of a final drive (rear end) noise on coast down.