Pulsating sound at 85/90 mph-g11/12

[Rad]

hello, I have the following problem, when the car picks up about 140 km (85 miles) it starts to have a strange slight pulsing sound as if I am stepping on a continuous center line, but with a slightly slower interval after an extended one. When turning right, the hum disappears, when turning left, the sound goes from slow pulsating to fast pulsating. Today we tested the car on a lift at a speed of 140 km and the mechanic claims that it can be heard from the front differential, did he have a similar problem with the G11/12 Xd, as far as I read they have problems with them.
Note: I replaced both right hub bearings! For 5000 km driving sound is same , no change


if i got a word wrong please excuse my bad english

[Rad]

My question is, has anyone had a problem with the front differential on the same car, and if so, what are the symptoms? Please, only people who have a problem with the front differential on the G-series

[jokerswld34]

When was the differential fluid last changed? If it hasn’t been changed, try flushing the fluid and see if that solves your problem. If not, I’d check bushings and brakes to make sure nothing is binding (which is what it sounds like)

[Rad]

It was changed yesterday, as there is no change, I bought the car at 140 thousand and I have no idea if the oil was changed before me, but it was brown without chips

[Rad]

Originally Posted by jokerswld34

When was the differential fluid last changed? If it hasn’t been changed, try flushing the fluid and see if that solves your problem. If not, I’d check bushings and brakes to make sure nothing is binding (which is what it sounds like)

the sound is typical like a bearing, it comes at a speed of 80/85 miles so I can hear it, I can detect it at a lower speed of about 60 miles maybe, but at 140 it becomes unpleasant with a slight resonance in the seat, imagine that you pass through a broken axis line, precisely at such pulses comes and stops fast

[DBMSPORT7]

I'm not sure about our cars but I know from my Ford F-150 a warped brake rotor will exhibit the same type of pulsing sound at certain speeds. I just had my brakes done on my F-150 before I got my 740 and I had to replace the two front brake rotors because they were warped and I was getting a pulsing sound at about 60 to 65 miles an hour, faster I went the worse the pulsating got.

And they were not that warped...any amount of warpedness will pulsat the brake calipers

[Rad]

Originally Posted by DBMSPORT7

I'm not sure about our cars but I know from my Ford F-150 a warped brake rotor will exhibit the same type of pulsing sound at certain speeds. I just had my brakes done on my F-150 before I got my 740 and I had to replace the two front brake rotors because they were warped and I was getting a pulsing sound at about 60 to 65 miles an hour, faster I went the worse the pulsating got.

And they were not that warped...any amount of warpedness will pulsat the brake calipers

No, this is not related to the brake system, the steering wheel does not vibrate when the brake system is on, there is a massive problem with the steering wheel and when braking