Transmission & Differential Gear Additives

[Displayhawk]

I found this article on the LubeGard website about 8-speed GM automatic transmissions. I have used LubeGard Platinum Transmission Treatment on previous cars I have owned and never had a problem with the transmissions. I was also going to upload their catalog, but it is too large for the server here. If you go to the LubeGard website, you can find it. For the record, I have absolutely no connection to LubeGard other than as a customer.

I apologize if the files won't open! I have copied and pasted the text below.


General Motors has issued several technical service
bulletins pertaining to torque converter clutch
shudder issues in two of their 8-Speed transmissions;
8L45 & the 8L90. This problem currently
affects 11 different models across 3 different OEM
manufacturers between the model years 2015 and
2019. GM’s solution to this problem is lengthy &
complicated, requiring 20 liters of ATF be flushed
through the system to replace as much fluid as
possible, yet still has not corrected the issue in some
cases. With these vehicles approaching the end of
their limited powertrain warranties, you can expect
to see an increase of these vehicles in your shop.

We're here today to offer you a better,
less complicated, and less expensive way to
service these transmissions successfully with fewer
comebacks and customer complaints.

We used our state-of-the-art Falex Multispecimen
testing platform to develop conditions that caused
shudder to occur between an automatic transmission
friction plate and steel plate when lubricated
with GM's recommended ATF specified in their
technical service bulletins. We then eliminated
the shudder under the same conditions by adding
Lubegard Platinum High-Performance ATF
Protectant to the test ATF at the treat rate of 2
fluid ounces per quart. An added advantage of the
Lubegard Platinum High-Performance ATF Protectant
was control and stabilization
of the friction
at a constant level throughout the tests.

When your customer is suffering from
TCC shudder and/or slippage, you can help
them avoid the expensive replacement of their
OEM ATF by simply adding 2 bottles of Lubegard
Platinum ATF Protectant, or, if the customer
insists on replacement, you can avoid recurrence
of the TCC shudder with the addition of 2 fluid
ounces per quart of Lubegard Platinum High-
Performance ATF Protectant.

 

[Jmlo96]

Keep in mind that this article does not pertain to the 8-speed automatic used in TourXs. The TourX have an Aisin (Toyota) 8 speed front wheel drive automatic. This article pertains to rear wheel drive GM vehicles such as Silverado, Camaro, CTS, ATS, etc.

 

[Displayhawk]

Keep in mind that this article does not pertain to the 8-speed automatic used in TourXs. The TourX have an Aisin (Toyota) 8 speed front wheel drive automatic. This article pertains to rear wheel drive GM vehicles such as Silverado, Camaro, CTS, ATS, etc.

Does the TourX have a different 8-Speed transmission than the Sportback? If I'm not mistaken, the Sportback has an 8-Speed for the AWD cars, and a 9-Speed for the FWD cars. I have heard in this forum that the 9-Speed FWD cars have issues, so maybe the LubeGard Platinum additive could help with it. Like I said, I have used it in the past on different transmissions, and never had a problem.

 

[Jmlo96]

Does the TourX have a different 8-Speed transmission than the Sportback? If I'm not mistaken, the Sportback has an 8-Speed for the AWD cars, and a 9-Speed for the FWD cars. I have heard in this forum that the 9-Speed FWD cars have issues, so maybe the LubeGard Platinum additive could help with it. Like I said, I have used it in the past on different transmissions, and never had a problem.

TourX and AWD Sportback use the same Aisin 8 speed. The GS and the FWD Sportback use the GM developed 9 speed.

 

[Displayhawk]

Welp, I contacted the GM (Chevrolet) dealership where I bought my car and asked for a quote to replace the transmission fluid in my 2019 Regal Sportback with the Aisin 8-speed transmission. I was told that it would be $230. I told them to go ahead and do it. They started on it, and about 15 minutes later they came back and said it was going to be about $600 to do it! They said it was because the trans fluid was $70 a quart! I talked to the service manager and he was NOT pleasant to deal with! He knew his people screwed up when they quoted the price, but was trying to deflect the blame. He said I wasn't a good customer because I hadn't brought it in for any oil changes. I told him that I did my own oil changes, and if he would pull the CarFax, he would see that I did them approximately every 5,000 miles. I was finally able to talk him down to $450 to do it. I tell you all this so hopefully you don't get taken like I was. I am now going to an actual Buick dealership for any service work.
As a side note, I also told them that I needed the TSB for the grayed-out radio buttons, and even told them what the TSB number was, and they told me that it would be $170 to do it. When I took my previous car (Mazda3) in to Mazda, they did it for free and gave me a loaner!

 

[wuffy68]

Welp, I contacted the GM (Chevrolet) dealership where I bought my car and asked for a quote to replace the transmission fluid in my 2019 Regal Sportback with the Aisin 8-speed transmission. I was told that it would be $230. I told them to go ahead and do it. They started on it, and about 15 minutes later they came back and said it was going to be about $600 to do it! They said it was because the trans fluid was $70 a quart! I talked to the service manager and he was NOT pleasant to deal with! He knew his people screwed up when they quoted the price, but was trying to deflect the blame. He said I wasn't a good customer because I hadn't brought it in for any oil changes. I told him that I did my own oil changes, and if he would pull the CarFax, he would see that I did them approximately every 5,000 miles. I was finally able to talk him down to $450 to do it. I tell you all this so hopefully you don't get taken like I was. I am now going to an actual Buick dealership for any service work.
As a side note, I also told them that I needed the TSB for the grayed-out radio buttons, and even told them what the TSB number was, and they told me that it would be $170 to do it. When I took my previous car (Mazda3) in to Mazda, they did it for free and gave me a loaner!

Just seeing of a year later, you're satisfied with the new transmission - or did the problem persist?