3 replies to this topic

[jb7073]

I've noticed when riding with my wife in her '99 S70 AWD, that it makes a pulsating noise once she gets up to speed. The interesting thing is that the noise changes based on where I sit.
* In the front passenger seat, it sounds like it could be the front passenger wheel.
* In the rear passenger seat, sounds like it's coming from the rear passenger wheel.
* And in the rear driver's side seat, sounds like it's coming from the drive train or diff.
Plus in the rear there is a lot of road noise (is this normal? thinking peel-n-seal might be a project).

Any ideas of what it could be, and how to test to narrow it down?

FYI, not sure if it's related, but the parking brake doesn't work hardly at all.

[jb7073]

Since no responses here...
Dealer thinks it's due to a tiny bit of "cupping" on one tire.
Who knows. If anyone wants 4 tires, see the FS section.

[leurven]

Do you get vibration or this pulsating at higher speeds like 70mph?? Could be a drive shaft problem. Check the tire wear too as JB said. When did the car last have a service with spark plugs, air filter, etc..?

When was the ETM last replaced? How many miles on the car?

[jb7073]

Do you get vibration or this pulsating at higher speeds like 70mph?? Could be a drive shaft problem. Check the tire wear too as JB said. When did the car last have a service with spark plugs, air filter, etc..?

When was the ETM last replaced? How many miles on the car?

No vibration, just noise. I originally though it was more likely a wheel bearing, but can't be sure.
Car just had service (Filter, plugs, oil, etc). ETM also updated last week.

Thinking I may just replace all 4 tires if someone offers to buy the old ones for a FWD (or RWD I guess)