Hmmm... let's check the owner's manual...

 

Recomended Fluid is Dexron HP,
Here are what some choices might look like:
These are not reccomendations of any, just a quick search to find Dexron HP Automatic Transnission Fluid.

 

Thanks, so it is most likely that the original factory fluid is the AC Delco and not the Mobil 1. Mobil 1 is probably only used if you experience the shudder.

 

The AC fluid is Mobil 1 - GM does not own refineries.

 

Dexron 6 was never used in the 8 speed. The black label Mobil was the original fluid. That formulation was found to have a greater ability to absorb moisture. The blue label is the current fluid with less ability to absorb moisture. My 2018 had the flush procedure done at the dealer and that stopped the shudder in my truck.

 

Dexron 6 was never used in the 8 speed. The black label Mobil was the original fluid.

Not true. See the owners manual for my 2017:

 

I wonder if getting the transmission relatively hot now and then is good for it as it would burn off any moisture. Same can be said with engine oil - short trips = fuel dilution = shorter oil life.

 

So all 2018+ models should have the correct fluid? What about those members with 2018+ models complaining about shudder? Is it more than just the fluid?

 

No, all 2020+ models should have the correct, updated HP fluid. The TSB (https://static.nhtsa.gov/odi/tsbs/2019/MC-10163890-9999.pdf) applies to 2017-2019 model years with the 8L45 8-speed. If owners ignore the shudder then it can lead to more problems, but addressed early on it should only involve a fluid exchange to get the new fluid in.

 

Thanks for the correction, DieselDrax.

 

Ok so the gm authority link says upgrade to the new fluid. It doesn't specify black label to blue label. It doesn't specify what was used before the upgrade. Upgrade to what? We can only assume because of all the talk on the topic going from black label to blue label.

 

It was said in the TSB.

"Important: This procedure must be followed as published. The exchange process is required to obtain proper level of new blue label Mobil 1 Synthetic LV ATF HP fluid."

https://static.nhtsa.gov/odi/tsbs/2019/MC-10161881-9999.pdf

 

Ok but read page 6. On flush machine setup. It says...

"Initial TransFlow Flush Machine Setup Important: The prepping procedure only needs to be completed if the DT-45096 supply reservoir has DEXRON VI fluid in it and has not been converted to use the new blue label Mobil 1 Synthetic LVATF HP fluid. Note: The prepping procedure only needs to be completed if HP fluid is not in the supply reservoir."

I thought they went from black label to blue label. Dexron VI was before the black label? I read that the black label is compatible with blue if you don't get it all out on a drain or flush. It only mentions Dexron VI. Doesn't say to prep the flush machine from black to blue label. So what I'm trying to figure out is at some point was Dexron VI used in the 8 speed early on and then swapped to the black label and now blue label? I know GM hides information to the consumer for privacy reasons.
Now it is also possible that the flush machine was previously used to flush transmissions with Dexron VI hence the notation on flushing the machine. But you would think there would be a notation about black label being in the reservoir and how to address it before using the blue label. Ok, that's it for now.
🤔

 

GM Part # 19418066

 

No...

Black label was the first HP fluid used which caused problems. There is nothing proving they had Dex6 by mistake. The owners manual reference is a red herring.

Blue label was to mark the updated HP fluid which replaced the black label.

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The 2017 8 speed did not use Dexron VI. The flushing machines can use any trans fluid. The procedure is to flush out any Dexron VI from the machine before the flushing procedure to the vehicle. GM does not want any cross contamination of fluids during the process. Trans flushing machines are commonly used for many other procedures not just for the flushing on the 8 speed.

 

Anyone suggest a good place to order in Canada online or buy the blue label mobil lv atf hp tranny fluid? I checked every shop in my small city and none of them carried it!

 

Your local dealer should carry it, but they may charge a premium price. Then again, it seems like stuff on Amazon for Canadians is 2-3x the price of the same thing here in the US so the dealer might not be more expensive than Amazon.

Do you have a Napa nearby? They could probably order it if they don't carry it...

MOBIL 1 SYNTHETIC LV ATF HP ESS 124715 | Product Details (napacanada.com)

 

I never asked any of them about ordering as I assumed I would eventually find it somewhere….and yeah amazon is like $140 plus 15% tax on top of that for 6 quarts…..omg. Yes I will be trying to order it in end of summer if its cheaper than amazon…

 

I got my fluid from Summit Racing. They ship fast and free.

 

Amazon has a deal now. It's the Blue label even though they show the black label.

 

@jerry455 @6speedTi the user is in Canada, cost/shipping is quite different compared to the US. Ordering from Summit adds at least $40 for shipping, duty fees, etc. for that 6-pack.

Similarly, the cost from Amazon.ca is a lot more than here in the US.



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Sorry, I did not know there was such a difference in shipping between US and Canada.