Groan/Rub When Turning - Dodge Challenger Forum: Challenger & SRT8 Forums
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post #1 of 25 (permalink) Old 04-28-2019, 07:14 AM Thread Starter
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Groan/Rub When Turning

I've had a groan/rub sound when I fully turn one direction or the other (when making a U turn for example) going on for about a year now. I took it in once and they told me it was a boot that had come loose, and they told me they couldn't replicate the sound again. The sound came about around a month later and has been getting



I noticed it before I bought my new wheels, so I do not believe they are the cause.


I am taking the car into the dealer for a second time on Tuesday and I insisted I have a tech with me so he can hear the sound.

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post #2 of 25 (permalink) Old 04-28-2019, 07:56 AM
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There is a chance this may be related to what I dealt with, but when occasionally turning or going in reverse I would hear a noise that sounded like something was rubbing.

After multiple trips to the dealership, they told me that the rear diff had too much fluid from the factory and drained it to the appropriate level. I haven’t heard the noise since, so hopefully this helps you.
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post #3 of 25 (permalink) Old 04-28-2019, 08:11 AM Thread Starter
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There is a chance this may be related to what I dealt with, but when occasionally turning or going in reverse I would hear a noise that sounded like something was rubbing.

After multiple trips to the dealership, they told me that the rear diff had too much fluid from the factory and drained it to the appropriate level. I haven’t heard the noise since, so hopefully this helps you.

Really, the rear diff?


Okay, I'll make sure to mention it. What year is your car?
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post #4 of 25 (permalink) Old 04-28-2019, 08:18 AM
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Originally Posted by praiseV8 View Post
I've had a groan/rub sound when I fully turn one direction or the other (when making a U turn for example) going on for about a year now. I took it in once and they told me it was a boot that had come loose, and they told me they couldn't replicate the sound again. The sound came about around a month later and has been getting


I noticed it before I bought my new wheels, so I do not believe they are the cause.

I am taking the car into the dealer for a second time on Tuesday and I insisted I have a tech with me so he can hear the sound.
What boot came loose? Did it come loose again?

Assuming the new wheels are not so wrong as to cause one or more tires to rub the noise can arise from several things.

One is even if the new wheels are blameless something has come loose and at full lock a tire is rubbing against something.

(With another car I heard a noise -- hard to describe and not very loud -- at speed. Long story short upon getting down on the ground and with a flashlight I spotted the leading edge of a plastic under body panel showing signs of abrasion. What had happened is some fasteners had failed and at speed air pressure pushed this panel down at the front and the leading edge rubbed against the pavement).

A hydraulic power steering system can make noise when the wheel is turned full lock. This can be normal. Depends upon the level of noise and if the noise is accompanied by any other symptoms.

At a slow speed sharp turn a rotor can lightly touch a brake pad. Because the turn is at slow speed and other noises are not very loud this can be heard. Turns at higher speeds maybe not.

Pedes_Nex tells of an over filled diff. (Never heard of that causing a noise before but I'll put it on the list.)

A bad wheel bearing can be noisy. Generally a noisy wheel bearing goes from bad to worse in a short time. That is it is hard to imagine you driving a year on a bad wheel bearing without the bearing making it known it was the source of the noise.

A bad steering rack can account for the noise.

A suspected bad steering rack can sometimes be id'd by a "test".

Before this test, be sure the tires are properly inflated.

Where you can do this safely at a slow speed make a full u-turn with the wheel turned full lock. As the u-turn progresses, release the steering wheel and let it find its "center". Note the position of the wheel. Repeat this several times. Then do the u-turn in the other direction.

If the steering wheel doesn't return to the same position -- and the car headed straight- each time or when the u-turn is done from the other direction this points to a problem with the rack.
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post #5 of 25 (permalink) Old 04-28-2019, 08:24 AM Thread Starter
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What boot came loose? Did it come loose again?

No idea, I didn't notice any loose boots before or after my visit.


I have FR Demon Wheels, and I haven't noticed any signs of abrasion in the liners or other suspension parts.

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post #6 of 25 (permalink) Old 04-28-2019, 08:32 AM
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Quote:
Originally Posted by Pedes_Nex View Post
There is a chance this may be related to what I dealt with, but when occasionally turning or going in reverse I would hear a noise that sounded like something was rubbing.

After multiple trips to the dealership, they told me that the rear diff had too much fluid from the factory and drained it to the appropriate level. I haven’t heard the noise since, so hopefully this helps you.

Really, the rear diff?


Okay, I'll make sure to mention it. What year is your car?
Mine is a 15 SRT. it took them about a year and multiple trips to the dealership to find that.
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post #7 of 25 (permalink) Old 04-28-2019, 08:49 AM
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I wonder if it's the same noise I'm hearing

But after my alignment and half shaft popping out I been hearing a noise.

I know my fluid had been topped off twice once at a dealer and one at the alignment place 2nd time they didn't have the OEM stuff at the dealership that was near by so I added Lucas synthetic SAE 75W-90 gear oil.*

But then my liner did rub when the 1st place couldn't get the alignment in so I wanted to remove it see if the noise would go away to rule out the liner.

I'll see if I make an audio clip of how mine sounds it's been annoying me as to I never had it before.

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post #8 of 25 (permalink) Old 04-28-2019, 09:35 AM Thread Starter
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I wonder if it's the same noise I'm hearing

But after my alignment and half shaft popping out I been hearing a noise.

I know my fluid had been topped off twice once at a dealer and one at the alignment place 2nd time they didn't have the OEM stuff at the dealership that was near by so I added Lucas synthetic SAE 75W-90 gear oil.*

But then my liner did rub when the 1st place couldn't get the alignment in so I wanted to remove it see if the noise would go away to rule out the liner.

I'll see if I make an audio clip of how mine sounds it's been annoying me as to I never had it before.

Sent from my SM-G955U using Tapatalk

That's the thing is, it's barely audible, specially over the sound of the engine, but it is there and I've had passengers confirm it wasn't just me.
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post #9 of 25 (permalink) Old 04-28-2019, 10:34 AM
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If you have a limited slip rear diff and there is not enough friction modifier added, the diff will groan on low speed turns. The groan is such a low frequency which makes it difficult to identify where it is coming from. As for the CV boots, it is not uncommon for the larger clamps to go bye-bye. My outer CV clamp on the passenger side was missing when I only had 16K miles. If you see grease slung all over one of the rear wheels it's most likely due to a missing clamp.


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post #10 of 25 (permalink) Old 04-29-2019, 07:41 AM Thread Starter
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If you have a limited slip rear diff and there is not enough friction modifier added, the diff will groan on low speed turns. The groan is such a low frequency which makes it difficult to identify where it is coming from. As for the CV boots, it is not uncommon for the larger clamps to go bye-bye. My outer CV clamp on the passenger side was missing when I only had 16K miles. If you see grease slung all over one of the rear wheels it's most likely due to a missing clamp.
Well, I found this service bulletin.

You can be sure I'll be giving this to my tech when I drop by.




Thanks to everybody for the advice, I would have been going in half blind tomorrow if it wasn't for you guys.
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