While/whistle when coming to a stop?

[kjwzoom]

2006 SL AWD w/ 44k miles

So we've only had our Mo for about 3k miles and just started noticing -- I honestly don't know if it has been doing this since we got it and now I'm just listening more or what...

When I come up to a stop sign or stoplight and either brake or coast to a stop, there is a noticeable whine/whistle -- sounds like a big-rig or diesel pickup -- but I know I don't have a turbo that is spooling down.... I can hear it with the windows up and radio off, more distinct with the window down. Is this normal noise for the CVT or not?

If that isn't specific enough, I'll try to clarify...

[kjwzoom]

Anyone?

[2young2retire]

Sorry that I can't help with the noise. My '04 with 80+K miles is quiet, no whistling at all. I hope someone else on the forum has had the same problem and had it fixed.

[bourque_john]

Not completely sure if it's the same whistle, but I get one from my brakes. I've checked them multiple times and there's nothing wrong. Plenty of pad left, the wear bars no where near the rotor. I think it's just a matter of the ceramic pads.

You say it sounds like a turbo spooling down, it could be the electric booster that's just after your air box. I have the same truck just with 50K more miles on it. I haven't noticed the whistle but I do know there is an extra box on the intake hose that I think is an electric booster. I'm not sure as I haven't asked a mechanic, nor have I opened this thing to check, but it's the only logical thing I can come up with for it's purpose. If it is a booster it should only be coming on when you mash the gas down. Either you drive the snot out of your MO, or it's malfunctioning and staying on at all RPM ranges. Not really a bad thing I don't think. If, and I want to remind that this is largely guess work here. But if it is an electric booster and just staying on the whole time it shouldn't really mess with anything. One day it might quit doing that when the electric motor burns out, but again, it shouldn't change anything.

This is the thing I'm talking about. The MAS sensor is before it, and I have yet to find out for sure what it is.
Modified by bourque_john at 10:01 AM 2/7/2010

[Desert Rat]

brake squeal is all I can think of.

Try removing the brake pads and adding some anti-squeal compound to the backsides of the pads.

[BBISHOPPCM]

I've owned two Nissans w/ CVT transmissions, and yes, this is perfectly normal. Besides, your transmission is covered for 120,000 miles/10 years! Don't worry!

[kjwzoom]

No, it isn't the brakes -- I'm talking about when COASTING to a stop, not using the brakes.

I know the transmission is covered for a long while, but I was just curious. Hoped it wasn't something else, that's all.