I’ve noticed at slow speeds that I can hear a rotational scraping sound coming from the back of the car, like a metallic swish swish sound. It seems to be getting louder. I’m guessing the sound is still there at higher speeds, it’s just drowned out.
It doesn’t go away if I put the car in neutral and it is more pronounced when I turn right, and fades when I turn left, so I’m guessing it’s load based.
First thoughts are driveshaft or wheel bearing… but I always thought bearings grumbled rather than scraped.
Ideas ? I’m guessing jacking it up will remove the load and therefore I won’t be able to reproduce it ?
Could be as simple as a wheel balancing weight catching the bottom bolt of the hub mounting. This happened to me last September, & took a couple of days to figure it out - I too thought it was either a wheel bearing or a dodgy cv joint so was well chuffed in the end!
I have a sort of swishing/ticking sound I hear when I’m on the outside lane of the motorway, it’s just the pads resting against the rotors because touching the brake pedal even very slightly changes it from a swishswishswishswish sound into a constant swiiiiiiiiiissssssssssshhhhhhh sound.
so it’s load based. does that mean it goes away when you put the car in neutral but is otherwise constant, or does it seem proportional in frequency or intensity to either road speed or engine revs ?
if no to the latter then you may have something resonating around the exhaust, such as a connection in the system or a bit of heat shield making contact.
i have this. it annoys me but not enough to get off my arse and do something about it.
I had similar one recently when the brake cable clip on the wishbone was catching on the wheel weighs, there was a witness mark on the clip. Cheap fix to that one!
Less likely here as it occurred more under cornering.
