Driving 2019 6.2 with 10 speed in L9

SeeTire · June 19

Why when driving my vehicle in Drive/using all 10 speeds/gears, does my vehicle transmission have weird things happening? When I drive it in L9 it works flawlessly. What’s up with that? I had the latest and greatest T-fluid installed but when in Drive the transmission operates like.

Colossus · June 19

What is the latest and greatest t-fluid? These transmissions are very sensitive to what type of fluid you use.

redwngr · July 13

1500 transmissions call for

10 speed uses Dexron ULV

8 speed uses Dexron HP

6 speed uses Desron VI

I'm curious too.

What are you using?

EDIT:

Should have checked before replying.

OP hasn't been seen since making that post.

Edited July 13 by redwngr

Fltmech · July 24

Probably not the transmission but the Fuel management, which is inactive in L9.

MTY55 · July 31

On 7/24/2024 at 4:55 PM, Fltmech said:

Probably not the transmission but the Fuel management, which is inactive in L9.

I have to agree with you. M 23 5.3 Denali at low speeds under like 35 feels like a slight transmission shudder when cylinders deactivate. If I just put it L. at that speed its usually L6. Starting in L6 transmission shifts smooth as silk. Looks like a 3.0L Duramax is in my near future.