I've noticed that on my 05 tC I've been hearing a whirring noise when I go more than 35mph. I can hear it before that speed, but it is barely noticeable.

On the highway it is pretty scary sounding. I'm able to shift just fine. Also, if i put it in neutral, the sound is still present. clearly it is coming from under the hood and associated with the speed that the wheels are spinning

i'm guessing I either need to rotate my tires or I have a problem with my differentials?


I changed to mt90 about 4 years ago and I do regular maintenance on my car :? ideas?

 

it could be a bad wheel bearing. I'm too lazy to type how to diagnose it so google it or search the SL forums (I commented about it in a much older post somewhere).

 

jack up car to get wheels off the ground. grab the tires at top and bottom in the middle. wiggle up and down. if it has any play your bearings are bad.

 

100% bearing. fix it now, or you're looking a new hub assembly, and that's no fun.

 

cool thanks for the replies guys. sounds like it might be coming from the passenger front side.

going to check this out tomorrow

 

differential

 

you would FEEL the wheel bearing

 

Aren't we all open diff from the factory unless you bought the trd lsd?

 

if you have access to a lift, have someone put the car in gear and get the wheels moving at 35-45mph and listen to each wheel if you hear a "whirring" noise it's the wheel bearing.

You can also tell by loading each side, i.e. if you turn right the weight of the car loads the left front wheel bearing, if you turn left the weight of the car loads the right front wheel bearing.

If you notice the noise goes away turning left your left front wheel bearing is bad. if you notice the noise goes away turning right, your right wheel bearing is bad.