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Discussion Starter #1 (Edited)
2015 SRT M6 with 26k Miles..

I had 4 tires put on the car Saturday. Pirelli Summer Tires that it came stock with.

The mechanic tells me that the RR tire is out of spec and ill feel a vibration in it..They didnt have another tire to replace it with and ordered a new one that arrived today.

I drove the car approx 50 miles and didnt really go above 60 as you could feel not so much a vibration but almost a wobble or like the tire was out of round.

I went back today and they installed the new tire and its got the same feeling.. I also noticed a slight "howl" on the way back to the dealership today in 4th gear at 45mph..I never noticed that before..

I assume they know what they are doing but after the tire replacement Saturday the pressures were all over the board and the one they put on today was at 38psi..not matching any of the others I adjusted to 32 after I got home.

I doubt I got 2 bad tires but I could be possible..

I doubt my rim is bent or they would have said so..I assume..As they cant get the tire pressures right, would they know this? The road force balancer would tell show this I believe.

What are the steps for diagnosing a vibration/wobble/howl like that in the RR of the car? If anyone knows id like to be armed with a little knowledge on what they should be looking for and what they should be doing besides checking the rim and tire?

Any feedback from a mechanic or someone with some knowledge of this and what would cause it if its not the rim and tire would be appreciated.

Thanks,

Pat
 

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Swap one of the front tires to the RR, see if wobble goes to the front. If yes, look for bent rim or another bad tire.
 

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I wonder if the Dealership knows what they are doing (inexperienced tech's) or just selling you defective tires?


It might be worth your time to take your car to a reputable experienced tire shop near your area, have them remove the rear tires and inspect them and road force balance them.

That way you would know for sure what is going on with the new set up.

If you take it back to the same Dealership, you may be fighting this issue for some time, which is Not worth the wasted time and aggravation.

JMO
 

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Discussion Starter #4
Thats what i wonder..they have a road force balancer at the dealership and the guy who worked on it Saturday is one of 2 regular guys who work on it.

Im wondering if yesterday it was some apprentice or something that just went through the motions.

Im going back Saturday to the dealer. Lets see what they come up with. If I feel like im going around in circles ill go to Mavis or Discount Tire and see what they think.

You almost cant drive at 80 its so bad..at 55 its there for sure..

Ill keep you guys posted.
 

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Thats what i wonder..they have a road force balancer at the dealership and the guy who worked on it Saturday is one of 2 regular guys who work on it.

Im wondering if yesterday it was some apprentice or something that just went through the motions.

Im going back Saturday to the dealer. Lets see what they come up with. If I feel like im going around in circles ill go to Mavis or Discount Tire and see what they think.

You almost cant drive at 80 its so bad..at 55 its there for sure..

Ill keep you guys posted.
Hi SnakeBT6,

Feel free to PM our page with any questions or concerns that may arise during your appointment, we're happy to help if needed!

Andrea
Dodge Social Care Specialist
 

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Swap one of the front tires to the RR, see if wobble goes to the front. If yes, look for bent rim or another bad tire.
THIS ^ They probably bent your rim or something underneath (hence the "new" howl sound). Now they'll most likely say you probably did it driving around with a bad vibration.. Or that it's "normal". Did I read correctly that you went to the dealership for new tires ?? The dealership ?? I don't even like to drive on the same side of the street that a dealership is on let alone pull into the parking lot. I hope its something minor and an easy fix for you. :|
 

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Discussion Starter #7
Hi SnakeBT6,

Feel free to PM our page with any questions or concerns that may arise during your appointment, we're happy to help if needed!

Andrea
Dodge Social Care Specialist
Thank you very much. Ill let you know if there are any issues.

TorRed,

LOL, Yeah im one of those.

Im pretty sure someone who wasnt "in the know" installed the replacement tire..theres a ton a weights on the rim too so I hope that all it is and they didnt get the heavy side opposite to one another on the tire and the rim. I worry about collateral damage to parts that shouldnt be vibrating like that is all.

Heading back Saturday morning. Fingers crossed its something simple.

Thanks.
 

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Good Luck SnakeBT6....... The kid probably didn't know how to properly balance a tire. Usually with quality wheels (which OEMs are) and a quality tire (which Pirelli is) and a person who knows how to properly mount and balance a tire/wheel combo there shouldn't be a need for a ton of weights (usually !!). Hope everything works out for you.
 

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Thank you very much. Ill let you know if there are any issues.

TorRed,

LOL, Yeah im one of those.

Im pretty sure someone who wasnt "in the know" installed the replacement tire..theres a ton a weights on the rim too so I hope that all it is and they didnt get the heavy side opposite to one another on the tire and the rim. I worry about collateral damage to parts that shouldnt be vibrating like that is all.

Heading back Saturday morning. Fingers crossed its something simple.

Thanks.
I wonder if some of the weights came off or where put on the wrong spot and hit the caliper.

I pulled my car out of storage this spring and one of the tires was thumping so bad i thought it was a wheel bearing so it can happen. These were 300 treadware tires so the temps should not have effected them.
 

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I wonder if some of the weights came off or where put on the wrong spot and hit the caliper.

I pulled my car out of storage this spring and one of the tires was thumping so bad i thought it was a wheel bearing so it can happen. These were 300 treadware tires so the temps should not have effected them.
I think the OP said the car was fine...., had new tires mounted and balanced and THEN had the wobble issue. Unless the weights fell off as they were lowering the car on the lift I think its most likely a bent the wheel or something underneath courtesy of the dealership..>:)
 

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When there are a lot of weights, chances are if they removed them all and started over, they'd only need a couple. I think they end up correcting for their 1st weight addition. A Guy
 

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My 15 RT came with Firestone Firehawks. It took the local dealer 4 sets until we got a pair that would road force. I kept going back. At one point I had the car put up for the winter and just left the rims and tires with them until they got a set that would road force. When it's cold out (below 45) you can still feel a little vibration. Keep at them until you get a good set.
 

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Discussion Starter #13 (Edited)
Went back in today,

The Mechanic and I went for a ride and he totally agreed that something was way out of wack and he then went through all 4 tires.

So the Right Rear tire they replaced on Monday balanced within spec. (they use a Hunter Machine.) Both Front tires were also right on.

The Left Rear (and I forget what the numbers mean) but it was a 27. They said the max should be 20. They ordered a new tire and itll be in Tuesday. He did his best to get it "more balanced" so the vibration would'nt be as bad while I used the car today...seems ok under 55 but really bad still at 70 or over. ( I only use it on the weekends as I live in NYC and dont drive to work. )

A bit disappointed in the Pirelli Tire QC honestly. Also with my dealer as when they did the tires to only notice one rear tire and not both were'nt right. Its a great service department and never had issues with them for routine maintenance until now, so I wont really complain but it goes right along with the reason most of us seem frustrated with dealer service.

Ill post an update next weekend after I get the LR replaced...hopefully all will be back to normal. Im not good at driving 55..LOL
 

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I am glad they found it and hopefully that will take care of the problem.

Keep us updated.
 

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My Service Manager said with performance tires you need a road force of = to or less than 16 or you will feel it! I have one that's 14 and it's the one I can feel.


Chewman
 

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Went back in today,

The mechanic and I went for a ride and he totally agreed that something was way out of wack and he then went through all 4 tires.

So the right rear tire they replaced on Monday balanced within spec. (they use a Hunter Machine). Both front tires were also right on.

The left rear (and I forget what the numbers mean) but it was a 27. They said the max should be 20. They ordered a new tire and it will be in Tuesday. He did his best to get it "more balanced" so the vibration would'nt be as bad while I used the car today...seems ok under 55, but really bad still at 70 or over. ( I only use it on the weekends as I live in NYC and don't drive to work).

A bit disappointed in the Pirelli Tire QC, honestly. Also, with my dealer as when they did the tires to only notice one rear tire and not both weren't right. It's a great service department and never had issues with them for routine maintenance until now, so I wont really complain but it goes right along with the reason most of us seem frustrated with dealer service.

I'll post an update next weekend after I get the LR replaced...hopefully all will be back to normal. I'm not good at driving 55..LOL.
Pirelli really I have not had good luck with them in the past 15 years. My shop here I use wont even sell them to me balance issues and I usually can roll the belts over on the left sides in 6 months to a year. I didnt want to say to much when you mentioned the brand before. I got some run flats on my 2015 Jeep srt 16 k miles there shot,the road feel has become atrocious this month.

Hate to say it but the older Goodyears Dodge were using really were the smoothest tires i ever have has in a vehicle.

One small thing being up north is the AL rim flange against steel corrodes pretty bad . So if they had trouble removing the rim originally it may have damaged that surface and made the rim wobble. I grew up in upstate and it was nothing to have to beat a rim off with a sledgehammer.
 

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Discussion Starter #17 (Edited)
Took the car in today, and according to their SRT mechanic..(not the same guy that worked on it last weekend.) I have a bad differential (talk about a surprise!) as well as 1 tire that is out of balance..(the left rear.) I just thought they were going to swap the out of balance tire.

I had mentioned a slight howl..I had noticed when I brought it in for the tire change but never really thought anything of it. Today the SRT Mechanic and I went for a test ride and he heard it as well as to experience the vibration.

After looking at it they called me later in the day and they ordered a rear differential and will replace the rear tire.

FYI I have 26k miles on the car and at 15k I had the transmission (M6) and differential fluid changed. I did so because I had taken it to English Town..dragged raced it for 3 passes and a week or so later had it on the road course there.

Ive also had it on the road course 2 more times. I was pretty conservative with it on the road course runs honestly.

I dont really drive the car hard at all on the street and dont do burnouts or any of that stuff. (cant remember any significant wheel hop but ive experience it a time or two.) Im surprised I had a failure. I kind of wonder if they got the differential full of fluid after I had the fluid changed or didnt put enough additive in it or something? Just a thought.

I will say this car always had a minor vibration in it, and have mentioned it to the service department on occasion (just in conversation, Not asking them to look into it.) Nothing crazy and sometimes it was there more then others. Sometimes you never felt it. But I noticed it. I guess the differential may have been an issue all along.

Ill keep you guys posted when I get it back.
 

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Discussion Starter #18 (Edited)
I picked the car up today and the one tire was replaced and the SRT Mechanic they have checked all tires for proper balancing..

Rides better then new..Smooth as glass.

They ordered the rear end for me and will let me know when it comes in. The 6M has a 3.90 in it already right? (2015 SRT) If not im going to see if I can get it. :)
 

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Thanks for the updates. Hopefully your posts will help someone else another time. I think the M6 cars have 3.91 gears in the rear end.
 

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Discussion Starter #20
Yes I confirmed..I looked my VIN up online as well and thats what it showed as well.

Ill post an update after the rear end change. Im told they are sealed units and and not much more to it other then a remove and replace of the unit itself.
 
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