Cold weather "whine" from rear end

[dotJake]

I'm still tracking this down, had the car since July, AZ weather turned "cold" and now in the mornings as I'm leaving the neighborhood, <20MPH, as I approach a turn and coast, there is a "whirring" or "whining" from what I think is the rear end. The sound definitely paces the speed of the car as it is higher pitch when it begins and the tone deepens as the car coasts or I begin braking.

I've dropped into neutral and it still does it.

This only started a few weeks ago when the AM temps are in the 40's. When the car warms up it goes away (maybe 1/2 mile to 1 mile). Does not seem to be related to the engine temp as I've idled for a while a few times and dash read 197 for engine the time I looked.

Any thoughts? I would think that by now LOTS of you in cold country would have heard this, which is what is making me uneasy.

It's a '17 GT w/ auto trans, 3400mi. Thanks.

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[timd38]

Interesting! I am in northern Wisconsin and mine is fine........

 

[Excelerater]

not sure what gear oil ford uses but its prob low end stuff..

a good synth wont get so thick in winter but IMO if the whine goes away with a little
heat in the gears i would not sweat it.. Never beat on a cold car

 

[TexasRebel]

most of the transmission still spins in neutral.

 

[dotJake]

most of the transmission still spins in neutral.

Agreed. Datapoint was that no combustion load was active, and compression drag was absent.

 

[dotJake]

I'll bring it up to F next time they attempt to fix the drivers window creaking at full-up.

 

[Dominant1]

Strange that its temp sensative but these diffs are easy to change the fluid in, i'd look into upgrading the diff fluid!

 

[melwff]

I have the same symptoms, 17 with Auto. Never heard it until temps dropped into the 30's and just like yours the noise goes away after a few minutes of driving, I have about 1,990 miles.

 

[VinnAY]

Agreed. Datapoint was that no combustion load was active, and compression drag was absent.

lol, no one thinks you're smart, guy.

 

[dotJake]

lol, no one thinks you're smart, guy.

lol, nobody cares what you think, guy.

 

[cop on my back]

If you have the PP, its the Torsen diferential.

 

[melwff]

I dont have the PP but have the whine.

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