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      01-26-2011, 12:48 PM   #1
RossM3
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Differential oil & track day

Hello everyone,

first post and first BMW. I am getting my differential oil changed tomorrrow(thursday) due to the widely known grinding sound issue. I was scheduled for a track day at Homestead raceway for Saturday.

Should I be concerned about the lack of time between the diff oil change and pushing the car at the track 3 days later? I want to avoid any damage I could cause by not letting the oil work itself into the LSD.

Thanks in advance!

Ross

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I've been fortunate to own some great cars with distinct personalities:
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'11 BMW M3 E90

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I'm not particularly a fan of saying this car is better or faster than that one. I'm more into how a car and driver are linked in terms of experience. Basically fast cars accomplish the same thing, they just go about it different ways. That said, my M3 (3k miles) has been the most rewarding car I have ever driven. The engine, steering feedback, interior, sound...all a perfect mix. I look forward to posting more on this forum with everyone. Thx.
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      01-26-2011, 12:52 PM   #2
Radiation Joe
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No concerns. Your diff is ready to go when you drive away from the shop. Of course it won't work as well after you change the fluid to something more slippery than what's in it now. There's nothing wrong with a little growling from the diff every now and then.
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      01-26-2011, 01:05 PM   #3
RossM3
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See I'm having a big internal debate on this. The sound is only at low speed turns when the car is cold; if this isnt harming the car, I'm inclined to leave it alone.

If I change the oil to the prescribed fix from the service bulletin, will this cause a performance difference? thats the last thing i want
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      01-26-2011, 01:20 PM   #4
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Ross......... The car is under warranty and its up to us to find the weak links in our cars so get out there on that beautiful, wide, beast of a road course and flog that little bitch like a rented mule.............. and on the off chance that you do have a failure dont mention Homestead to the dealer they tend to get a little pissy about that kind of stuff

Man I love that cork screw like turn @ Homestead, overall one of my fave courses next to Sebring or Road Atlanta which I've never driven at speed or at least not yet.
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      01-26-2011, 02:56 PM   #5
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Quote:
Originally Posted by RossM3 View Post
See I'm having a big internal debate on this. The sound is only at low speed turns when the car is cold; if this isnt harming the car, I'm inclined to leave it alone.

If I change the oil to the prescribed fix from the service bulletin, will this cause a performance difference? thats the last thing i want
Both of my e90 M3s have done the growl. I did not call it to the attention of the dealer with either of them. Don't compromise the performance of your car if you can live with the occasional noise from the diff.
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