Lubegard Red in 6L45?

[TT'ed]

Hey guys.
I have 2011 328i with 6L45. I think GM transmission is not a perfect match with german car- but it is what it is.
Recently mechanics did fluid and filter change for 60k mile. It was first trans service for this car.
But shortly after that, I was having weird 2-3 shift. 1-2, 3-4, 4-5, 5-6 or all downshifts are smooth but always 2-3 upshift.
Sometimes it changes gear like DCT (too fast engage, causes jerk) or sometimes takes too long between shifting.
Fluid they used are Valvoline Dex VI. Filter from BMW Dealership.
I verified fluid level- it was correct. Drained & Refilled with another 7 qts of same Dex VI. Still same.
Cold shifts during mornings are usually pretty much soft. Problem comes back when its hot. Usually after long drive or highway drive.

Pressures are all stable.

So here's a question... Can I add lubegard red to see it smoothens 2-3 upshift out?
No active codes, oil life count reset, adaptation reset already performed.
Already drove 500 miles after reset, still same. trans temperature is around 188F when it start to do 2-3 jerk.
Never reached 192F or more while monitoring.
Thanks guys.

 

[ripcord]

Well... can't say that I'm confident it will help, but it certainly won't hurt anything. I've used Lubegard red in all my American made cars and my transmission guy recommended it.

 

[JavierH19]

I believe you need to do a relearn procedure when you experience a 2-3 shift issue. But you can use LB red.

 

[TT'ed]

Well... can't say that I'm confident it will help, but it certainly won't hurt anything. I've used Lubegard red in all my American made cars and my transmission guy recommended it.

Thanks. will try

 

[TT'ed]

I believe you need to do a relearn procedure when you experience a 2-3 shift issue. But you can use LB red.

Is that works different way or same thing as adaptation reset?

 

[Andyd95]

We always put the lubegard instant shudder fix when servicing those transmissions because they are known for converter shudder and it helps tremendously. I’m sure red would be fine too for you.

 

[nascarnation]

Those were manufactured at Strasbourg France (very close to German border / Stuttgart) so they are neighbors after all.

 

[TT'ed]

We always put the lubegard instant shudder fix when servicing those transmissions because they are known for converter shudder and it helps tremendously. I’m sure red would be fine too for you.

Thank you so much!

 

[Exhaustgases]

The transmission is likely a good match to the car. Its the wrong fluid poured into the transmission that is not the right match.
I think the supplier for OEM German cars is Shell. Idemitsu for Japan cars. So if you don't want to buy at the dealer research who is the OEM supplier and use that. I don't care to gamble with automatic transmission fluid. It becomes testing when using non OEM fluid, I'd rather do that on something out of the car than in it.