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Discussion Starter #1 (Edited)
My new 19 with 5k notice a whine from diff at 60 mph and above which stops if I coast or turn car to right (left has no effect). Not very loud but coming from rear. Seems to have the symptons of a diff whine. Never notice it on my 17 in 32k miles. Has anyone else hear a whine?
 

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My 17 Giulia Q4 without out limited slip has been doing it since 3k miles and now it has 19k miles on it sounds the same. I did drain the diff and put in Amsoil that did make it quieter but it still does it.
My friend with a 18 started making the same rear diff noise at the same amount of miles as well.
 

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My 17 Giulia Q4 without out limited slip has been doing it since 3k miles and now it has 19k miles on it sounds the same. I did drain the diff and put in Amsoil that did make it quieter but it still does it.
My friend with a 18 started making the same rear diff noise at the same amount of miles as well.
ugh, I was thinking that whine was just some awful overtone coming from the exhaust. I wish I would have thought about it and paid attention to the loaner 2019 I had for a bit.
 
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I have a Q4 (14,200 miles) with no whine that I can hear but I will make note of it as I am heading on a trip Wed. I think a small amount of whine is very normal. If anything swap out for some MOTUL Gear 300 LS 75W-90. I doubt anything is wrong. May not cure it but could quiet it down. For reference every alfa I have owned has had a whine.

Have you driven it lightly these last 5K miles? Change the oil and see what happens. My bet is it will still be there for the most part.
 

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I have a Q4 (14,200 miles) with no whine that I can hear but I will make note of it as I am heading on a trip Wed. I think a small amount of whine is very normal. If anything swap out for some MOTUL Gear 300 LS 75W-90. I doubt anything is wrong. May not cure it but could quiet it down.
I drive mine hard enough so if there's going to be a problem it should occur, or at least be more noticeable, before the wty is up.
 

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My new 19 with 5k notice a whine from diff at 60 mph and above which stops if I coast or turn car to right (left has no effect). Not very loud but coming from rear. Seems to have the symptons of a diff whine. Never notice it on my 17 in 32k miles. Has anyone else hear a whine?
My 17 Giulia Q4 without out limited slip has been doing it since 3k miles and now it has 19k miles on it sounds the same. I did drain the diff and put in Amsoil that did make it quieter but it still does it.
My friend with a 18 started making the same rear diff noise at the same amount of miles as well.
Hi riparke & beta2alfa,

I certainly understand why this would be concerning. If you decide to address this with your local Alfa dealers, please let me know via private message. I would be more than happy to have your concerns formally documented within our system as well as provide you both with case specialists who can provide an additional layer of support as your Giulias are in service.

Mark
AlfaRomeoCares
 

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I have also been hearing a whine and will get it checked out at the Alfa Romeo dealer next week. It's not super loud but it's also not possible to ignore it (so far). I hear it on acceleration and above ~30 mph (something like that); not when coasting or braking.
 

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I have also been hearing a whine and will get it checked out at the Alfa Romeo dealer next week. It's not super loud but it's also not possible to ignore it (so far). I hear it on acceleration and above ~30 mph (something like that); not when coasting or braking.
I also don't hear it when I first start out -- it's usually at least 10 minutes into driving (up to this point).
 

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I also don't hear it when I first start out -- it's usually at least 10 minutes into driving (up to this point).
That's the same as me as well, the warmer it gets the louder it is, I honestly don't think it's a problem many vehicles I have owned have done similar things, like every Honda/Acura transmission I have ever owned. You should a hear the manual gearbox for a second gen Acura TSX, it whines louder than a autistic kid wanting candy and It was like that new off the lot all the way past 100k miles when it was sold.
 

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You should a hear the manual gearbox for a second gen Acura TSX, it whines louder than a autistic kid wanting candy and It was like that new off the lot all the way past 100k miles when it was sold.
And today’s award for least sensitive, most offensive and factually questionable post goes to......envelope please.....
 

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I hear something when coasting with foot on pedal, as soon as i take my foot off, slight whiny sort of noise, stops - cant be the diff as it would still whine after taking foot off, i figured its the probably fuel pump - figured the noise was normal as it only happens whilst coasting with pedal pushed -
only seem to notice it on open highway at 100kph or thereabouts
 

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I hear something when coasting with foot on pedal, as soon as i take my foot off, slight whiny sort of noise, stops - cant be the diff as it would still whine after taking foot off, i figured its the probably fuel pump - figured the noise was normal as it only happens whilst coasting with pedal pushed -
only seem to notice it on open highway at 100kph or thereabouts
Accel/decel are different loads on the differential gears, so yeah, it can still be the diff.
 
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I have also been hearing a whine and will get it checked out at the Alfa Romeo dealer next week. It's not super loud but it's also not possible to ignore it (so far). I hear it on acceleration and above ~30 mph (something like that); not when coasting or braking.
Hi efl,

Please be sure to keep us updated on your dealer's findings. If it would be of interest, I would be more than happy to have your concern formally documented and connect you with an Alfa Specialist for additional support as you work with your dealer. We're just a PM away.

Mark
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Discussion Starter #16
Well my dealer replaced the Diff and by the time I got off noisy interstate, I could hear it again. It's either something else or a bad run of Diff's (like I said my 2017 Q4 never made the noise in 32k miles). Tech suspected the drive shaft at first, it's not exhaust, u joint, bearings?
 

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There are few if any advantages to having a severe hearing loss, but I just would not be able to hear any thing like a whine or click or the like in my Quad. People like me are the ones who drive for miles with a turn signal blinking.

NV
I can hear these things but still sometimes drive with the blinker on for miles. hahaha.

I guess I would need to hear the whine but I every alfa I have had has a whine.
 

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Well my dealer replaced the Diff and by the time I got off noisy interstate, I could hear it again. It's either something else or a bad run of Diff's (like I said my 2017 Q4 never made the noise in 32k miles). Tech suspected the drive shaft at first, it's not exhaust, u joint, bearings?
I don't think there are any U joints. The drive shafts have rubber based flex joints. The half shafts all have some variation of CV joint. It seems likely that any of those could go bad and make a noise, but they are still not U joints.

Did the tech do the really obvious? check the fluid level and quality in each gear box
 

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Discussion Starter #20
I don't think there are any U joints. The drive shafts have rubber based flex joints. The half shafts all have some variation of CV joint. It seems likely that any of those could go bad and make a noise, but they are still not U joints.

Did the tech do the really obvious? check the fluid level and quality in each gear box
On the old diff he said diff fluid was dirty/ smelled burnt.
 
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