flats

My '20 has a rear gear whine.Is this common?

skank

Did you break the car in hard or did you break it in according to the manual recommendations ? The driveline machined tolerances have to be broken in easy also.

Bikerjulio

No, not common. In fact I've not heard of this before.

Mileage? Might be worth a trip to the dealer to check things out, including fluid level.

johnodrake

If you have gear whine, it will not fix itself. You are likely going to have a trip to the dealer in your future.

green2000

Mine wines mostly in the 40-50 MPH range. It was gently broken in. I haven't determined if it is related to a particular bank of gears. I'll discuss it with the service department when I'm there and see if there may be any info on it.

waynger

Sound from the rear of the car? Or did you mean reverse gear whine?

Bikerjulio

I reverse very very slowly when backing into my garage. Gear whine would be impossible. But who knows with this? I assumed driving in a forward direction was meant.

flats

Mine whines in the 40-60 MPH range.Guess it's a dealer trip.
flats

rponfick

If you are hard of hearing like me, it is not a problem.

rmp

could it be a wheel bearing whine?

lgodom

Usually wheel bearings make more of a roaring noise that's not speed specific. Almost every gear whine I've heard is in the 40-60 mph range. It won't improve over time.

SteveSoCal

Misaligned ring and pinions will often whine on drive, go quiet on coast
Or, vice-versa. Wheel bearing noise will change as load is shifted side-to-side.

Garycoral

I've got the same thing... Coasting it's quiet - Gently accelerate and I hear the whine.

Garycoral

Anyone else have a slight whine that goes away when coasting? You'd have to be on a smooth road - Radio off.

Z0Sick6

Its just your supercharger. normal.

Garycoral

I'm not driving my CTSV anymore - Traded that for the C8.

lgodom

If it’s coming from the rear of the car, it’s likely rear gear related. Improper set up can cause gears to whine under load and be quiet when coasting. There are a few posts about rear gear whine on the forum.

green2000

Coasting has more of a whine than steady speed. I accept it more than whine at intermediate speed steady state and acceleration.

Mid8tracker

Any update after taking it to the dealer?

Garycoral

Yes - Love to hear if the Dealer says it's normal...