Trans shifting question - '19 SO 4x4 with 68 trans - 3rd gear

[hpc3]

Can anyone explain what the transmission is doing with the shift programming on the SO/68 trans? Gear shifts on mine feel solid and crisp (w and w/o tow mode on) in all shifts except in 3rd gear it acts like it is slipping initially and then it grabs fully. Shifts into 4th from 3rd are crisp as expected. Is there some sort of lockup/converter event that is causing this feeling? Curious mostly... truck drives and performs as expected otherwise. We're at ~2500mi and have done some light towing (~6500lbs) maybe 4 times now, ~200mi each trip. I have been watching the changes with the gear display in the cluster.

TIA for any feedback.

 

[Brutal_HO]

I don't have a 68RFE but I suspect you're just feeling defueling and lockup events.

 

[Hoffmann]

I believe the 68rfe locks the torque converter in 3rd gear, so I would guess the "slip" your feeling is the torque converter being unlocked and not having a 100% engagement, and once it locks it feels better because it now it does have a 100% engagement.

I'm not a huge fan of the way this transmission shifts compared to my old duramax, it doesnt feel as smooth. but at the same time I do like that it locks the torque converter so soon because it feels like you get more power to the ground because it is locking up so soon.

So there's pros and cons to everything.

 

[floradoyle]

I believe the 68rfe locks the torque converter in 3rd gear, so I would guess the "slip" your feeling is the torque converter being unlocked and not having a 100% engagement, and once it locks it feels better because it now it does have a 100% engagement. happy wheels

I'm not a huge fan of the way this transmission shifts compared to my old duramax, it doesnt feel as smooth. but at the same time I do like that it locks the torque converter so soon because it feels like you get more power to the ground because it is locking up so soon.

So there's pros and cons to everything.

Thanks, very helpful

 

[elephantrider]

a good trans tune does wonders for those quirks.

 

[hpc3]

I believe the 68rfe locks the torque converter in 3rd gear, so I would guess the "slip" your feeling is the torque converter being unlocked and not having a 100% engagement, and once it locks it feels better because it now it does have a 100% engagement.

I'm not a huge fan of the way this transmission shifts compared to my old duramax, it doesnt feel as smooth. but at the same time I do like that it locks the torque converter so soon because it feels like you get more power to the ground because it is locking up so soon.

So there's pros and cons to everything.

Thanks for the feedback. I think my '08 2500 HD had the same trans... I just don't recall much about it though. I do remember the 35" tires upsetting the shifting but that truck was more of a weekend toy vs the '19 I have now which is for horse/towing use. No real complaints just trying to understand what I'm feeling.