I know this subject has been discussed at length but i have a few questions to pose...
1Ok the whine we have is when we are not applying any pressure to the acclerator...it is an annoying sound and goes away when we are accelerating..good excess to accelerate i know:biggrin:
2 I remember hearing that the whine could be from the differential...and that the differential oil had to be changed on the first 10k mile service..am i just imaging this or is it true?And if so do you think the whine could be something wearing away?Due to not enough oil?
Any inof would be greatly needed as the dealer says it is normal...coming from people who had no idea how to upgrade the m5's brakes i think it is safe to say it aint
hmmm
I have the exact opposite: in 6th and 60mph+, the driveline whines with throttle. Foot off gas, whine stops. Occurs sporadically, more pronounced on downhill runs. No discernable difference in performance with or without whine. Not a loud whine either.
Dealer put on an insulated housing around the drive line to muffle the noise. Just got car back last night during rush hour. Will test it out tomorrow and post results.
The diff oil gets changed during the 1,200 mile service, but not at 10K miles. The whine IS normal (not to imply everyone gets it though) and isn't speed related as much as it is load on the diff. The speed at which it whines is dependent on wind conditions, number of passengers, going up/down hill, etc. There is a service bulletin that details a fix, but I don't remember what gets done. I personally don't mind the whine and sorta think it adds a little character
I can't imagine that the insulated housing will help much - it seems to me that alot of this noise comes through the chassis and subframe
No short shifter. Actually the whine didn't bother me at all. I never noticed it until my daughter pointed it out one day. I'm sure it was there from day one. So I'm not too worked up about it.
Not inevitable. The Rogue Engineering shifter and the UUC non-adjustable shifter are both derived from a factory BMW shifter (E36 M3, I think) and use the stock rubber isolation block. There is absolutly no increase in noise transmission into the cockpit with either of these two shifters. (I've installed about a dozen of them.)
The UUC adjustable had some serious noise problems that have been mostly resolved through a product redesign. However, this shifter is a compromise between stiffness and noise isolation and will transmit more noise than stock as will any other shifter that uses stiffer or thinner rubber for isolation.
I had a bit of a whine in my e36 M3, too. I think the fix is to change the diff oil and put in some kind of additive. I would try changing the oil first and maybe try something "better" like Redline synthetic.
Adam, Wouldn't think they would forget to change it as it is standard procedure for that check-up. Has it just started suddenly or has the whine always been there? If its always been there I would worry and look upon it as a feature of the beast.
Pick up the car 10:30 Friday morning and no matter how old you are it still seems like being a kid again on Christmas Eve:cheers:
it is diff gears whine. such is the nature of the beast. any rear diff that is designed to handle 350+ hp will whine a little or a lot depending on how it is broken in, how it wears, level and viscosity of the gear oil, speed, load and the phase of the moon
you can tear it appart and redo the gears and it will most likley quiet them down.. for a few weeks. then they will whine again. it is normal.
No, you don't have to change the diff. oil every 7500 miles. But sometimes changing to an aftermarket syn. fluid will help the noise. But some noise is inevitable. To handle the torque, the gears need to be cut in a "less quiet" way, i.e., straighter.
Arrgh... ok so the gears are producing this sound like that because of the huge torque the engine produces...ok...But i havent heard of the this problem with every car with 300+ torque do this?I merely ask as it is definetley not a normal sound...I guess as AJ said ya just have to live with it..
But thanks again all for the very informative insights!:cheers:
John i would pics asap when you pick up your beast!
Just drove my car over some grades. No whine that I can detect.
The dealer work description says: " Checked and found a whinning noise at light throttle at freeway speeds. Removed exhaust manifold amd heat shields. Installed drive shaft bearing insulation strip and a rubber plug on body hole at driveline housing above bearing. Test drove vehicle and noise is no longer heard."
I don't know if this is a 'fix', but things improved. I'll get more miles on for more definitive results.
This could easily be a valid fix. We under-appreciate the importance and complexity of the sound-deadening stuff in our cars. I once ran into a fellow board member at the dealership - he had gotten his car back from service and wanted me to drive it to confirm that the clutch felt alright. It did, but I heard a noise I didn't like - sounded like engine noise coming through the ventilation system. Turns out they had done some work around the steering assembly and failed to properly replace a rubber grommet where there steering tube went through the firewall. The seals between the body and the rest of the world, no matter how small or hidden, are there for a reason and you WILL hear it when they're not right.
My 2000 m5 developed the diff. whine at 20,000 miles. The dealer did the service bulletin of installing the insulation around the carrier bearing , that solved some of the whine but you could still hear it. They recently replaced the entire rear diff and the noise is gone. I would ask for a new diff. Good luck.
When I bought my '00 with 14k miles, the exact whine that has been described was there. I had already ordered the Dinan 3:45 diff upgrade, so I decided to wait and see. Well....
The whine was totally gone once the 3:45 was installed. I'm at 20k miles, and still no whine. And oh, by the way...it feels like I'm driving a totally different car!
I had the same whine in my diff and had it replaced after it became worse and a different speeds. They said it was the wrong oil was put in when it was new. And as you said mine was also only at very light throttle applications that the sound could be heard. I can't here it at all in the new diff.......maybe because of the Nowack exhaust.
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