Odd grinding noise

[joeyb26]

So i have about 650 or so miles on my F80, and it seems that whenever the car sits overnight or sits for a day, whenever i start it up and start driving it makes a really weird grinding noise usually at low speeds, sounds like im grinding gears, but i'm not. seems to be coming from the right side of the car, i think towards the rear. anyone else experience this?

[GBPackerfan1963]

Originally Posted by joeyb26

So i have about 650 or so miles on my F80, and it seems that whenever the car sits overnight or sits for a day, whenever i start it up and start driving it makes a really weird grinding noise usually at low speeds, sounds like im grinding gears, but i'm not. seems to be coming from the right side of the car, i think towards the rear. anyone else experience this?

rut-roh! Another diff failure?

[RickMonet]

Originally Posted by joeyb26

.... sounds like im grinding gears...

Yikes! Not a pleasant sound. That doesn't seem right - if it is repeatable take it in first thing Monday.

[dhoggm3]

Sounds like the diff. Does it only happen when turning? M cars of the past have made "grinding" diff noises on slow turns , and it was considered "normal".

[/// M sa]

Originally Posted by joeyb26

So i have about 650 or so miles on my F80, and it seems that whenever the car sits overnight or sits for a day, whenever i start it up and start driving it makes a really weird grinding noise usually at low speeds, sounds like im grinding gears, but i'm not. seems to be coming from the right side of the car, i think towards the rear. anyone else experience this?

Take it in ASAP your rear diff is failing and if it fails all the way the wheels will lock up on you. That is exactly what my issues was, it sounds as if your rubbing (tires) or even something is stuck in the break pads.... Also it will take about 3 weeks to get the part from Germany. Have them drain the fluid and it will be dark with shit load of metal particles in the fluid.

[JoeFromPA]

If it's a pulse grind that doesn't come back, it's ABS doing a test cycle.

If it's your diff, it will happen all the time in that given situation.

People on here tend to assume something is broken when given an incomplete description. Please explain more.

[/// M sa]

Originally Posted by JoeFromPA

If it's a pulse grind that doesn't come back, it's ABS doing a test cycle.

If it's your diff, it will happen all the time in that given situation.

People on here tend to assume something is broken when given an incomplete description. Please explain more.

My diff was going bad and it made the noise at low speed and turning and it went away at high speeds.

[Wah]

The E9x M3 had an issue with a noisy diff when turning at low speeds. There was a service bulletin to replace the diff fluid with a different one, which corrected the problem. I don't know if this is the same thing, but just saying that a noisy diff doesn't necessarily mean that it is failing. I hope it turns to be nothing.

[/// M sa]

Originally Posted by Wah

The E9x M3 had an issue with a noisy diff when turning at low speeds. There was a service bulletin to replace the diff fluid with a different one, which corrected the problem. I don't know if this is the same thing, but just saying that a noisy diff doesn't necessarily mean that it is failing. I hope it turns to be nothing.

BMW only now replaces them per dealer. BMW won't allow the tech to even open the diff and it has to be completely replaced.

[onatuesday]

Originally Posted by dhoggm3

Sounds like the diff. Does it only happen when turning? M cars of the past have made "grinding" diff noises on slow turns , and it was considered "normal".

I wouldn't characterize diff grinding noises as "normal". It's not supposed to make that sound. Did many e46+e9x Ms suffer from that noise? yes. But mostly well into the life of the car not within the first 1000 mi. As mentioned usually changing the diff fluid did the trick but not always. IMO, the only acceptable drivetrain noises one should hear from a $70k car should be when you are putting the transmission into gear. Hopefully this is NBD but better bring it in to be safe rather than sorry.

[Stevens21234]

Shit, this model year sounds like a disaster

[GBPackerfan1963]

Originally Posted by Stevens21234

Shit, this model year sounds like a disaster

Yep......everybody cancel your orders and take your cars back. We have a travesty in the making.

[Sir Loin]

Originally Posted by joeyb26

So i have about 650 or so miles on my F80, and it seems that whenever the car sits overnight or sits for a day, whenever i start it up and start driving it makes a really weird grinding noise usually at low speeds, sounds like im grinding gears, but i'm not. seems to be coming from the right side of the car, i think towards the rear. anyone else experience this?

Hey Joeyb26, would you please click the link below to go to the options and packages survey thread and submit a survey entry to the survey for your new car? Thanks.

http://f80.bimmerpost.com/forums/sho...d.php?t=999667

[Lups]

Originally Posted by Stevens21234

Shit, this model year sounds like a disaster

This forum messes with the statistics so good. And since we write most about the fails, now all we can spot are those. Let's wait for the numbers before crying ourselves to sleep every night. I'm pretty sure we don't get the same picture as can be seen from them.

[Wah]

Originally Posted by Lups

This forum messes with the statistics so good. And since we write most about the fails, now all we can spot are those. Let's wait for the numbers before crying ourselves to sleep every night. I'm pretty sure we don't get the same picture as can be seen from them.

She speaks the truth...

[SakhirM4]

Originally Posted by GBPackerfan1963

Yep......everybody cancel your orders and take your cars back. We have a travesty in the making.

Guess that will leave more F8x cars for those who really want them.

[Zero4910]

Originally Posted by Lups

This forum messes with the statistics so good. And since we write most about the fails, now all we can spot are those. Let's wait for the numbers before crying ourselves to sleep every night. I'm pretty sure we don't get the same picture as can be seen from them.

I agree. Does nobody remember reading all the I///M Delivered, EU delivery, and regular delivery reviews? We've seen what, 2-3 rear diffs, 2 seat logo noise, 1 A/C issue, and some other minor negative/problem reviews.

So a handful of issues vs nothing wrong from the several other hundred(s) of M3/4 from all the press reviews, YouTube reviews, and magazine write ups.

I feel for the folks who have had issues, but so far the number of good vehicles far out way the bad.

That being said, I pick up my M3 tomorrow and now I'm going to have every issue I just mentioned.....I'm starting to sound like you Lups.....I have to quit these forums

[/// M sa]

Every car maker will have some issues go wrong with some of their cars. It's a numbers game, sucks for me to be part of that statistic with a faulty rear diff.

[Sir Loin]

I recommend we start these threads below:

- M3 accelerates too fast when throttle pedal pushed down, jerks my head
- Warm (and then HOT) air comes out of exhaust pipes after starting car, doesn't go away until after car is turned off
- Gas tank drains quickly after only driving 300 highway miles, is there a hole in my gas tank?
- left turn blinker seems to blink 20ms faster than E92 M3, extremely annoying!
- No sunroof on my Carbon Fiber roof, SA screwed me?
- Manual transmission missing 7th gear, worst transmission evar!
- excessive wind noise when only one window glass is rolled down, even at only 50mph

[/// M sa]

Originally Posted by Sir Loin

I recommend we start these threads below:

- M3 accelerates too fast when throttle pedal pushed down, jerks my head
- Warm (and then HOT) air comes out of exhaust pipes after starting car, doesn't go away until after car is turned off
- Gas tank drains quickly after only driving 300 highway miles, is there a hole in my gas tank?
- left turn blinker seems to blink 20ms faster than E92 M3, extremely annoying!
- No sunroof on my Carbon Fiber roof, SA screwed me?
- Manual transmission missing 7th gear, worst transmission evar!
- excessive wind noise when only one window glass is rolled down, even at only 50mph

Lmao

[tooch]

Originally Posted by Sir Loin

I recommend we start these threads below:

- M3 accelerates too fast when throttle pedal pushed down, jerks my head
- Warm (and then HOT) air comes out of exhaust pipes after starting car, doesn't go away until after car is turned off
- Gas tank drains quickly after only driving 300 highway miles, is there a hole in my gas tank?
- left turn blinker seems to blink 20ms faster than E92 M3, extremely annoying!
- No sunroof on my Carbon Fiber roof, SA screwed me?
- Manual transmission missing 7th gear, worst transmission evar!
- excessive wind noise when only one window glass is rolled down, even at only 50mph

[Lups]

Originally Posted by Zero4910

I agree. Does nobody remember reading all the I///M Delivered, EU delivery, and regular delivery reviews? We've seen what, 2-3 rear diffs, 2 seat logo noise, 1 A/C issue, and some other minor negative/problem reviews.

So a handful of issues vs nothing wrong from the several other hundred(s) of M3/4 from all the press reviews, YouTube reviews, and magazine write ups.

I feel for the folks who have had issues, but so far the number of good vehicles far out way the bad.

That being said, I pick up my M3 tomorrow and now I'm going to have every issue I just mentioned.....I'm starting to sound like you Lups.....I have to quit these forums

Let's just cry in the shadows when ours break down. I'm so sure this will indeed happen to me, I'm packing pregnancy tests, water bottles, food and of course a mechanic to my road trip. I know for sure I'm not pregnant, but just to make sure the story is the saddest one ever, I'll make him pee on the sticks when the car breaks down. I now am thinking how to come up with the job advertisement.