8 speed transmission issues still in 2021?

[SilveradoRST]

Is it fair to say people are generally having less issues with the 8 speed transmission now after the new Mobil 1 ATF blue label was used?   Forum thread posts are usually (but not exclusively) posted when they are experiencing an issue.  Would like to hear if people with the new ATF from factory have been happy with it thus far?  

[voided3]

We have a '21 Silverado LT 5.3 + 8-speed 4x4 truck with almost 11,000 miles currently. We had the dreaded lifter issue on our L84 engine early on at 585 miles, but the transmission (knock on wood) has not given us any issues to date. We use it to tow a 3,700 lbs. travel trailer, as well, and roughly half of the miles on the truck were towing that trailer (but we didn't use it to tow at all until about 4,200 miles, so it had a long break-in period as we had to wait several months for the trailer to be delivered to our dealer).

 

I monitor the transmission temperatures and the hottest I've ever seen it get on the road was 195 degrees F towing in slow moving stop and go traffic on a really hot day. The average transmission temps I see towing are between 156 - 180 degrees F depending on conditions, and I use tow haul mode in L6 on the gear selector.

[dgstarr63]

I have a 2021 Silverado, 5.3, 8 speed 4WD assembled in Sept. 2020. I was getting intermittent rough downshifts into 1st gear.  My dealer replaced the transmission valve body last month and it now shifts perfectly.