humming sound after driving for about 2 hours.

[Richardrs2]

Hi all. I am getting a hunning sound from the front of the car which comes and goes but it only does it when the car / transmission is hot after about 1.5 hours of normal driving.

Any help whould be great.

Cheers

Richard RS2

[alastairg]

Brake pads failing to sit back in the caliper due to galvanisation build up between the steel backing clip & aluminium caliper body. Common issue & my educated guess. Wheel bearing usually an issue from the moment you set off.

[Richardrs2]

Ok thanks. Would this not make the noise all of the time though not just after 1.5 hours when hot ?

Does anyone know that the situation is with diff / gearbox oil changes ? If the oil was getting hot due to a low level could it make a humming sound from the diff or gearbox ?

[alastairg]

Unlikely but worth changing the oil.

[teknobod]

Prop centre bearing?

Mine does it after 1.5-2 hours.

Andy

[alastairg]

Possible, however mine gave a noise with the car stationary on throttle lift off @ 3.5k & under load with lift off throttle. You get the noise of that bearing when worn when you create load & Xs movement & then noise. It would not cause a constant noise on the run in my experience. Its the calipers

[AlWyn]

Difficult without hearing the noise but i had a simular sort of noise from the offside front which was the calipers/pads issue Alistair mentioned which is well documented and the huge amount of brake dust that had built up... mine was all sorted with new calipers and pads.