[DirtyDieselRacing]

So i’ve had this issue with my car ever since i bought it. It starts at about 40mph and the pitch increases with speed. Its not engine related its more of a rotational noise like grinding and it gets louder when i turn the car to the left on a highway bank for example.

Things i have done:
Changed rear right wheel bearing
Swapped tyres
Changed tyres front to back


Now im thinking it could be a driveshaft on the rear right cuz it gets louder as the weight shifts and loads the car on the right. I have heard it could also be engine mounts.

Any help is greatly appreciated 😩

[charlie_m]

My first thought would be wheel bearing, but you've already had that done. Next thought would be a failing CV joint. Outside chance it could be the LR wheel bearing.

Is the rubber accordion boot still intact? Is your car lowered, or running a lot of camber?

[lnxguy]

Should have done the other wheel bearing as well.

[RayLivingston]

Check the parking brakes. I once had an incredibly loud "dinging" noise on my E46. Sounded for all the world like it was coming from the back end of the trans. I tore my hair out finding it. Turned out to be the left rear parking brake. One of the clips holding the shoes in had popped off, which caused one of the springs to fall off, and periodically hit the drum. The noise was transmitted, with truly stunning efficiency, through the half-shaft, through the diff, up the drive shaft, and somehow came out at the front of the driveshaft! Re-assembled the parking brake, and it's been fine ever since.

A grinding noise can also be brakes. Are you sure yours are in good shape, not worn and/or dragging? Could be any of the diff bearings as well.

[alpinec1984]

lightly applying the hand brake (with button held in please!) should rule in/out the ebrake. Similarly a light brake pedal application should tell you if discs pads etc are involved or not. If no change then probably cv joint on the rr half shaft. Have you jacked and looked closely? Failure is almost universally preceded by boot rippage.

[DirtyDieselRacing]

Thank you for the help everyone. I will have a closer look and try all these things.

[Serf27]

It’s the right front bearing.
Confirm by remove the caliper/brakes and freely spinning the hub.

[Tambohamilton]

Originally Posted by Serf27

It’s the right front bearing.
Confirm by remove the caliper/brakes and freely spinning the hub.

This.

[DirtyDieselRacing]

Hi everyone i just had my car checked by indi and he claimed it was the diff!

I then did a 500 mile journey across the uk and it luckily didnt blow up!

The car is parked for now still dont know whats doin it. But im gettin closer

[DirtyDieselRacing]

Originally Posted by Serf27

It’s the right front bearing.
Confirm by remove the caliper/brakes and freely spinning the hub.

Thanks mate! The sound comes from the rear. If i fold the seats down in the back it gets waaaaay louder

[infinite_creations25]

Just be 100% it's the diff because diffs don't normally go bad on e9x except on the 4 cylinder models... I made the mistake of replacing my diff after chasing down a roaring noise from the rear. Long story short, it was the wheel bearing the whole time.