[Tresbien]

Hi! I recently bought a 2017 M2 and just noticed a light whirring sound at (very) low speeds, mainly when slowly pulling away from a complete stop. As it’s speed dependent only and unaffected by gear choice (1st or 2nd), i guess i’m hearing the drive shaft spinning, maybe coming from the carrier/support bearing. As i have an oil change booked next week, should i mention this at the dealer, or is this a common/normal drivetrain noise? I’m under warranty until may, so if there’s a potential issue i’d like to get it looked at asap.

[Poochie]

Originally Posted by Tresbien

Hi! I recently bought a 2017 M2 and just noticed a light whirring sound at (very) low speeds, mainly when slowly pulling away from a complete stop. As it's speed dependent only and unaffected by gear choice (1st or 2nd), i guess i'm hearing the drive shaft spinning, maybe coming from the carrier/support bearing.

It's normal; all M torque-vectoring diffs, from the 1M to M6, makes a sort of low, mechanical whining sound.. It gets worst sometimes when you're sharply turning..

Nothing to be alarmed about, just the nature of the vehicle's mechanics.. But it cost nothing to ask the dealer to review and document your complain. They might flush the fluid, which never hurts

[Tresbien]

Ok! Thanks mate! Guess i’m a bit paranoid about these things from my E60 M5 days.

[Tresbien]

Left my car at the dealership today to get it checked before my warranty expires in May. BMW called me a few hours later to let me know that they want to replace the differential and booked me an appointment in four weeks..

[jessetaylor1]

Oh wow, good thing you brought it up to them.

[Tresbien]

Yeah. Not looking forward to breaking in the new diff though..

[nioh_lbbm2]

Originally Posted by Tresbien

Yeah. Not looking forward to breaking in the new diff though..

Went through a warranty replacement for my diff as well. Having to go through two 1200 mile break in periods was torture

[ZM2]

Originally Posted by nioh_lbbm2

Went through a warranty replacement for my diff as well. Having to go through two 1200 mile break in periods was torture

What was your issue?

I’m almost thru my 1200mi break in on my new diff that was replaced a few weeks back due to vibration.

[nioh_lbbm2]

Originally Posted by ZM2

What was your issue?

I'm almost thru my 1200mi break in on my new diff that was replaced a few weeks back due to vibration.

My diff would make a really loud rattle or gear grinding noise when accelerating from a slow speed during turns. It also would cause the car to creak when load was reversed from easing off the gas. Happened around 5k miles on the car