GM 9T50 / 2.0 LSY and Lubegard

[service_now]

My 9T50 has the slightest shudder when cruising on low rpm, or when lightly accelerating from 1200-1500rpm.
I have also noticed some occasional harsh downshifts when decreasing speed from highway cruising, most likely related to 6th gear.

I don’t know whether this is normal for 9T50/LSY, as I have owned this car for few weeks now. There is only 40k miles on the clock and atf fluid has been changed recently (drop/fill with oem dex vi).
I’ve been thinking to put some Lubegard into transmission, to prevent further problems.

Has anyone comments or experience using Lubegard Red or Platinum with 9T50?

 

[wlk]

I have Red in all my vehicles but not one like yours. I'd try it but have no experience with Plat. to say about it, as I've never used it.

 

[meep]

No direct experience with 9T50, but I will say I like lubegaurd red. Shudderfix is also well reputed. Does red include anti-shudder properties? One thing I will suggest “less is more.” Dont start with a full treatment. Start with 1/4 dose and work your way up. I *might* consider 1 more drain-fill, even to a more robust fluid like amsoil, first, then attempt first dose LG.

 

[MurkyAsparagus]

I don't believe it's uncommon for the engine/transmission combo. My '23 Blazer with the LSY and 9T60 does the same thing. Every one I've driven does it too. I think it's less of a shudder a more of the solenoids switching what cam profile they are on from efficiency to power. It always occur at low RPM when trying to accelerate. It's like the turbo is spooling up combined with the solenoid switching cam lobes.

I could be wrong.

Lubeguard is well liked. However, I've still have yet to understand how it may prevent further problems or whatnot. Someone needs to educate me.