[Emoto]

Originally Posted by MANNAXMAN

I have provided the TSB # and described the issue. Two local dealerships still say they need to diagnose it prior to performing the service as described in the TSB.




i007spectre and The_Dudebozo - How big are the dealerships you took your cars to? The two closest to me are pretty big and apparently don't offer that type of customer service, even when you have documentation indicating a diagnosis isn't required. I spoke with service managers at both locations.


I'm getting the same spiel.


The replies I'm getting from service managers are along the lines of "They are service bulletins and just a reference for the technicians. We still need to diagnose and confirm that the issue matches what is described in the TSB."


I found the latest version of TSB 18-NA-355 two weeks ago.

Two things:

1. I know the bulletin says no diagnosis needed, but if they want to do that anyway, set it up with the service writer when you book the appointment and say you will drive it and demonstrate the problem. That way they can't say they were unable to duplicate it.

2. Call the Chevrolet customer service number in the owner's manual and open a case with them. Don't be adversarial, just ask for their help.

[7evenout]

Had the new fluid flush. over 3k in miles. Have not experienced the shudder. Early morning starts 1st and second shift rough but goes away after a few minutes.

[MANNAXMAN]

Originally Posted by Emoto

Two things:

1. I know the bulletin says no diagnosis needed, but if they want to do that anyway, set it up with the service writer when you book the appointment and say you will drive it and demonstrate the problem. That way they can't say they were unable to duplicate it.

2. Call the Chevrolet customer service number in the owner's manual and open a case with them. Don't be adversarial, just ask for their help.

Thanks for the advice. I took a tech for a test drive on my initial visit (took it in for the shudder and for a convertible top related repair). The tech told me he could feel it. I was told that there was a week's backlog for transmission service, but I couldn't leave my car that long (it's my daily). So I've been trying to schedule another appt. However, they keep insisting that it still needs to be diagnosed. When I told the service adviser that I took a tech for a test drive on my initial visit, he replied "That tech was not a transmission tech." When I spoke to a service manager and told him that a test drive with a tech was already done, he had nothing to say other than they still need to diagnose the issue. smh

I will definitely be calling customer service to try to get some assistance.

[Emoto]

Originally Posted by MANNAXMAN

Thanks for the advice. I took a tech for a test drive on my initial visit (took it in for the shudder and for a convertible top related repair). The tech told me he could feel it. I was told that there was a week's backlog for transmission service, but I couldn't leave my car that long (it's my daily). So I've been trying to schedule another appt. However, they keep insisting that it still needs to be diagnosed. When I told the service adviser that I took a tech for a test drive on my initial visit, he replied "That tech was not a transmission tech." When I spoke to a service manager and told him that a test drive with a tech was already done, he had nothing to say other than they still need to diagnose the issue. smh

I will definitely be calling customer service to try to get some assistance.

I see this as a dealership problem. The place I use here in the Boston area couldn't have been nicer about it all. Maybe a different dealer would be more accommodating? If you couch it in terms like "I am shopping around for a dealer to do all of my service work" which is more than just getting warranty work done, maybe they will want your business?

[i007spectre]

Getting ready to take my first trip since having the newest flush done. Guess we will see if it shows up again.

[i007spectre]

Zero issues on the trip. Well at least not involving this.

[MANNAXMAN]

Originally Posted by Emoto

Two things:

1. I know the bulletin says no diagnosis needed, but if they want to do that anyway, set it up with the service writer when you book the appointment and say you will drive it and demonstrate the problem. That way they can't say they were unable to duplicate it.

2. Call the Chevrolet customer service number in the owner's manual and open a case with them. Don't be adversarial, just ask for their help.

Originally Posted by MANNAXMAN

Thanks for the advice. I took a tech for a test drive on my initial visit (took it in for the shudder and for a convertible top related repair). The tech told me he could feel it. I was told that there was a week's backlog for transmission service, but I couldn't leave my car that long (it's my daily). So I've been trying to schedule another appt. However, they keep insisting that it still needs to be diagnosed. When I told the service adviser that I took a tech for a test drive on my initial visit, he replied "That tech was not a transmission tech." When I spoke to a service manager and told him that a test drive with a tech was already done, he had nothing to say other than they still need to diagnose the issue. smh

I will definitely be calling customer service to try to get some assistance.

Originally Posted by Emoto

I see this as a dealership problem. The place I use here in the Boston area couldn't have been nicer about it all. Maybe a different dealer would be more accommodating? If you couch it in terms like "I am shopping around for a dealer to do all of my service work" which is more than just getting warranty work done, maybe they will want your business?

I tried following your advice as to not being adversarial/confrontational, but GM Customer Service is a joke. They sounded very similar to the dealership. They fed me lines like "The TSB is VIN specific and does not apply to your particular vehicle." and "Diagnosis of your issue requires a tear down of your car which will take at least 2 days." When I asked where does it say that it is VIN specific, the rep said "I just told you it was VIN specific". To which I replied, "I know you told me, but where did you get that information from?" She never gave an answer. The rep and her supervisor sounded just as ignorant on this issue as the dealership.

[ZarusSS]

Just took mine in for an inspection and the flush. No issues with the service department.They are aware of the new TSB. We'll see how it drives tomorrow

[CamaroChk]

GM bought back my first 2017 SS Camaro via Lemon Law, so I got the new 2018 SS Camaro in April (didn't like the grill on the 2019's). My old one had all kinds of problems including this one and the diff groan, given the amount of people with those two issues here I figured if I got another Camaro they would probably have those two issues. Drove off the lot and within a week it developed the torque converter shudder. Was pretty pissed but I kinda expected it, really hoped not, but not surprised. They fixed it the next day after a short test drive with the new fluid and I've now put over 5k miles on it and haven't heard a peep out of it. So - so far so good.

However now its getting cold, I have the diff groan issue. Luckily, given all my problems with my last Camaro, the service guys have been really great and they know all about the bulletins (from my paperwork of the last Camaro), so I haven't had to convince anyone into fixing it. They tried to fix it a couple days ago, but the weather got warm and they couldn't test if it was fixed. This morning its 40f and its still making the groan, so back we go for a 2nd flushing and replacement fluid.

[Wilka_SS]

The transmission fluid update has a friction modifier as well as they changed things up to make the fluid less hydroscopic, I'm a gm service tech in Southern Louisiana for the past 8 years. The latest fluid revision seems to have done the trick because I have only had very few trucks or cars return after performing the new flush and update and the ones that did mistook tire roadforce vibration for their transmission concern. Those of you who had the converter replaced, you're dealership will be in deep shit with GM because we were urged to not replace torque converters for the concern as it wasn't the problem. The problem is the moisture in the air breaking down the fluid causing the shudder, not the converter itself.

[PHLCamaro]

If the shudder was present long enough, could damage have been done to the torque converter that simply changing the fluid won't fix?

[HCI2000SS]

Originally Posted by PHLCamaro

If the shudder was present long enough, could damage have been done to the torque converter that simply changing the fluid won't fix?

Absolutely. That's what happened to mine. They replaced the torque converter along with the new fluid and flush

[Mgsouthwest2001]

Well guys, I decided to move back to a mopar. My shudder had not come back but a few weeks ago I am not completely sure but I thought I heard the rear diff groan again. The car had not started doing it again consistently though. But, I have been a mopar fan over the last several years. I have had Challengers that were great cars. So, when a sweet deal opened up on this new 19 Scatpack 1320 I went for it. I love it. Take care everyone. And, I sincerely hope this last fluid flush does turn out to be the permanent fix for Camaro owners.

[PHLCamaro]

^^Seems to be my problem. I had the flush done last week and the car is no better.