Can the 8L90-E transmissions be fixed?

[felso]

I have a 2015 with the dreaded 8L90-E GM slush box. It's a piece of junk that only gets worse with age. Is there a way to actually fix this thing? I wouldn't mind upgrading some of the internal parts if I could make function like it should. I don't want to put stock parts back in. They didn't do so well the first time. What have others done?

[CamGTP]

Yes, with new parts, new converter, the new fluid and a good transmission tune they work really well.

[NWI Denali]

Do you have the new fluid?

[felso]

On 2/27/2023 at 4:08 PM, NWI Denali said:

Do you have the new fluid?

The new fluid stopped the "rumble strip" shudder. It still has another condition that I would call a shudder. It still has delayed engagement, stumbling, etc.

[felso]

On 2/26/2023 at 9:40 PM, CamGTP said:

Yes, with new parts, new converter, the new fluid and a good transmission tune they work really well.

What converter/kit do you recommend? I'm not putting the OEM trash in it so it can break again.but i