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Discussion Starter #1
I recently bought my 2013 Dart Rallye with just under 50k on it and started quickly running up the miles. I noticed a "growling" noise out back that follows the speed of the car, so I figured maybe rear wheel bearing, but at now, just over 50K on the car, that was less than likely. I let it go and figured I'd just observe if it got any worse over time or changed in any way before I would panic. Well, I just got tired of listening to it and gave it a look see.

The inside edge of my right rear tire was really badly cupped. I'm sure that's where the noise was coming from at least. Problem is what may have caused it. Cupping like this, to me, is usually from a really worn strut or shock or badly worn suspension part that interacts with that part of the suspension. Now, to be fair to the situation, when I bought the car, the previous owner did say he bought used tires to replace what was worn, so maybe the tire had cupping from the previous car it was on when I got it and I just hadn't realize it yet. Hmmm. The gravy thickens!

Anyway, so I removed that wheel and checked out the attached suspension parts which all look really good. I didn't unbolt the rear shock to check it's action independently from the car, though, I just jounced the car and it leveled out pretty quickly, like in less than one cycle after I released it. All pretty textbook really. So, at this point, first, I need to replace the tire and start to really listen for any other noises or vibrations. Watch funny wear patterns like a hawk. I don't just want to waste a chunk of change and a day looking for a reputable alignment shop to actually do the alignment. (Read this as too many really bad experiences over too many years). I've lost my faith in service shops in general; too many get rich quick schemers.

Anyway, I have an appointment this afternoon for that one new tire. I'll keep you posted.

Tom
 

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Discussion Starter #2
** Update! **

So, I just got back from getting a new tire. There's absolutely no change in the noise from the right rear wheel. So, I just ordered a new wheel bearing for that wheel. Hard to imagine that a wheel bearing would fail so quick. I wonder if Fiat/Dodge decided to use the same wheel bearings from the little Fiat 500 in our Darts. Nice!

Will update when the new bearing gets delivered and I get a chance to install it.

Tom
 

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Tom,
Looking forward to your results. There are a few of us that are experiencing this noise. Grawling/howling like a wheel bearing going out.

I replaced both rear wheel bearings and it didn't change the noise on mine. I'm at 45K on my 13 Dart. I have heard that tread pattern can cause sound/noise and i did recently change my tires too but can't say if the noise started with the new tires.

Someone told me to rap duct tape around half of the tire and if it was tread pattern causing the noise the tape would alter the sound. Haven't tried it yet.

Good luck and let us know if you figure it out.

Dave
 

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Well, long drive Monday, business related or I would have stayed home. It was 800 miles one way. Noise got really bad and I panicked. I had a shop change out the bearing. Noise is gone! So is about $330 bux! LOL! Well, I have a new bearing at home waiting for me to get home now. Cost about $52 on Rockauto. Moog w a lifetime guarantee.

David, I really thought mine was tire noise, too. At only 50k on the odometer, I had real trouble believing the wheel bearing was out already. But mine just had to be. Do you have any Dart buddies near you that you could swap tires with for a few minutes to eliminate them from your suspicions? I was going to go out and buy another set of wheels / tires just to test this. I'm a bit of a "wheel whore" or so I've been called. I like having extra wheels and tires to swap when the mood strikes!

On to my next issue! Clutch pedal games!

Later!
Tom
 

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Cool that you got the problem resolved. I got my replacement bearings from Rockauto too but I opted for the Timkin bearings instead of the Moog. Do you know what bearings were actually installed? Mine isn't getting worse is why I am leaning towards tire tread.
Don't have anyone around me to swap tires with so I will probably just turn up the tunes and pretend I don't hear it.
 

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The repair shop didn't share what brand they installed, but told me the repair was guaranteed for 2 years. I'm guessing it was Moog because the Timkin wheel bearing assembly was only warrsntied for 1 year.
 

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If you install a CAI it helps too. Removing the airbox that has baffle chambers increases the engine noise on acceleration. Actually sounds pretty good not like the big coffee can hondas.
 

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Discussion Starter #9
I test drove a Dart earlier last year. It had the CAI and a short throw shifter, both of which I hated. So those, at that point, I decided would never darken my door. OK, maybe sometime, but not while I still clearly recall how much I didn't like either of them. LOL!

Tom
 

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my tires also cup in the rear, have had at least 3 alignments at different places in hopes of fixing it, no luck as of yet, I work in a shop and have checked it out many times and can't find anything besides the upper control arms were not designed properly i have sent an email to moog because they make adjustable control arms for the focus which also has the same problem but until someone comes up with something i rotate tires every oil change, and also my rear wheel bearings have been making noise for almost 20,000 miles but so far i can stand the growl and no play in the wheel yet
 

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Starting to see problems vary from car to car. I had no wear on my tires even after 25k miles on lowered suspension. When I installed my Eibach springs the only thing I did was adjust the camber as far as it would go to try and correct for the lowering. Have not had any alignment work done on mine. I'm on new tires now but only because I went to 18s. Had 35K when I switched and I am at 45K now.
 

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Discussion Starter #12
As I understand it, cupping occurs most often from bad struts. Just like my wheel bearings, I am having a hard time believing struts failing at 50k. That being said, I may spring (pun intended) for a set of BC coilovers anyway, so if I do, that will replace the rear struts that still may be causing some bouncing vibration in the suspension. A tire in back sounds like it is cupped but the look smooth, so that may be one of the struts.
I wouldn't be at all surprised that these tires are noisy, either. Heck, the reality is that I really don't need performance oriented tires on this heavy Dart anyway, so first chance I get I really wanna put something quieter on this car. Been looking for another set of factory wheels, 17's, in hyper black, so I can mount the new tires to, but haven't found any within driving distance. I wanted to go 18's but I wanted quieter tires and 18's don't really support that option for me.
I'll keep looking.
 

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Discussion Starter #13
frieslanddart2013, I hope you're right about Moog and that they may make an adjustable control arms for our Darts.

I just replaced my rear brake rotors and pads. They were very badly worn. Most of the noise and vibration left coming from the rear of my car is gone now. The inner pads were very badly worn into the rotors and, I'm betting, were acting like the grooves in an old LP record, transmitting noise into the car from these grooves. My car sounds really awesome now!
I also just bought new wheels and tires from Tire Rack to get rid of the scalloped tires. My concern was, from when I first got the car, that the previous owner, who admitted he bought used tires to put on the car to sell it, may have put scalloped tires in the car without realizing it. This may be the only way to find out if the car scallops the tires or not. So I'm starting with new tires to see if they wear badly going forward. Time will tell now.

 

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I hadn't thought about brakes making noise like what I am hearing. Usually think of the squealing of worn brakes. Not the droning.
 

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Discussion Starter #16
I honestly had never seen brakes worn like this. I wonder if it's a design issue or just very cheap original parts. I bought the Stoptech rotors and pads, all four wheels. Surprisingly inexpensive too. Oh, and sporty looking! Holes and slots and stuffs! LOL! I feel like a kid again!
 

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The most common cause of tire cupping are excessive toe/camber, play in balljoints, or worn control arms.
 

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Discussion Starter #18
Yeah, but in this case I still think the previous owner bought tires with cupping symptoms as used tires just to sell the car. He told me that he bought used tires because his tires were beat, just to sell the car since he didn't want to pay for new tires with the car being for sale (recent).

Thanks for the additional input, though.
 
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