Differential whine or something else?

WarMachineM3 · 11-04-2022, 12:53 PM

https://youtube.com/shorts/7FUz_OJei0I?feature=share

So, this sound has beceome increasingly louder from a year ago. I thought there was something wrong with the diff, and after doing doing some research I noticed it was an issue for many cars. I'm modded ad was denied by my warranty due to "aftermarket springs" although couldn't prove it. Anyway, I'm not really noticing a difference in performance, but also haven't tested it due to rear diff lock and chassis stabiization notifications popped up. It sounds like a gear whine that gets increasingly gets louder to a certain point and is constant, but the winding achieves a fixed speed, not directly affected by the speed of the car, but it's constand at load and unload, on throttle and off throttle. It's audible upon acceleration and deceleration and highway speeds. Doesn't sound like a pulley. Assuming it's a gear in the diff or the motor. Sounds like an RC car with the sound it makes when you try to force it forward or backward.

JAI///M3 · 11-04-2022, 04:01 PM

I can hear it but it's really hard to tell from the video. Seems like engine acceleration is constant as is the whine.

I almost thought it was turbo noises honestly. What mods do you have? Have you changed diff fluid recently?

11-04-2022, 12:53 PM	#1
WarMachineM3 Second Lieutenant 54 Rep 246 Posts Drives: M3 Join Date: May 2021 Location: California iTrader: (1)	https://youtube.com/shorts/7FUz_OJei0I?feature=share So, this sound has beceome increasingly louder from a year ago. I thought there was something wrong with the diff, and after doing doing some research I noticed it was an issue for many cars. I'm modded ad was denied by my warranty due to "aftermarket springs" although couldn't prove it. Anyway, I'm not really noticing a difference in performance, but also haven't tested it due to rear diff lock and chassis stabiization notifications popped up. It sounds like a gear whine that gets increasingly gets louder to a certain point and is constant, but the winding achieves a fixed speed, not directly affected by the speed of the car, but it's constand at load and unload, on throttle and off throttle. It's audible upon acceleration and deceleration and highway speeds. Doesn't sound like a pulley. Assuming it's a gear in the diff or the motor. Sounds like an RC car with the sound it makes when you try to force it forward or backward.
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11-04-2022, 04:01 PM	#2
JAI///M3 Lieutenant 528 Rep 502 Posts Drives: F80 M3 Join Date: Dec 2021 Location: East Bay iTrader: (0) Garage List 2018 F80 [0.00]	I can hear it but it's really hard to tell from the video. Seems like engine acceleration is constant as is the whine. I almost thought it was turbo noises honestly. What mods do you have? Have you changed diff fluid recently?
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