Loud when driving 35-40mph

hdurham · Post by **hdurham** » 25 Feb 2013, 19:43

I have a 2004 xc90 with approx 95,000...A couple months ago I had a flat which was patched and drove-on for about 2 months...during that time I started to notice a loud humming noise when driving 35-40mph. The noise gets quieter over 40mph. Have had the tires replaced but no change...any suggestions?

Post by **xHeart** » 25 Feb 2013, 20:01

Mostly likely the hub-bearing assembly is on its way out. I lived through it entire summer, then the noise became constant above 30mph. You would not hear anything else but the noise.
I replaced both front around thanksgiving.

lenny · Post by **lenny** » 25 Feb 2013, 23:16

yea i agree, humming noise is almost always associated to wheel bearings and gets worse over time.
don't think the tyre will have caused it though.

Post by **xHeart** » 26 Feb 2013, 19:15

It was Justin who suggested, that is, drive at a constant speed next to a separating wall on freeway. If the noise does not change with the change of RPM, then for certain, it is hub-bearing. In my case he was right on.

Grabbing wheel at 3 and 9 o'clock, and then 6 and 12, looking for movement is any shop's way to reach for your pocket.

hdurham · Post by **hdurham** » 26 Feb 2013, 19:37

if there is movement what would that mean?

Post by **xHeart** » 26 Feb 2013, 19:55

hdurham wrote:if there is movement what would that mean?

Some would argue a play in constant velocity (CV) joint at the outer axle, look for clicking when driving on a curve, or making a turn.

Search this forum for "cv joint", "hub bearing" to get started.

hdurham · Post by **hdurham** » 01 Apr 2013, 15:19

so..finally took it in and they say the "rear end is going bad". Has anyone had this happen? Also, the shop I took it to recommends getting rid of it due to history of transmission problems...

Post by **boosted5cyl** » 01 Apr 2013, 20:19

Did they give you a quote or say exactly what the parts needed are. As mentioned its probably hub bearings and to be honest, thats a maintenance item on any vehicle with high miles.

Transmission, well the GM transmission mated to the T6 has been known to be problematic, but if you have a 2.5T you should be fine. On that note if you have a 2.5T find a new mechanic if you can.