2011 Stock Sierra 6l80E Tuning Suggestions?

[naterosalez]

I have a 2011 Sierra with the 5.3/6l80e on 35s and 22s. Everything is stock except for an exhaust, 3-inch level, and tires. 3.42 gears. I tuned the transmission after doing some research and watching videos as well as looking at some other tune files. Im looking for help on getting the 1-2 and 2-3 shift a little better. Maybe I am super picky, but the shifts seem to be either too slow and soft or too quick and harsh. I can't seem to find a good sweet spot. Ive done lots of revisions trying to get it perfect, and this last time it was pretty damn close to perfect but after putting a couple hundred miles the shifts seemed to kind of slow or lag a little on the 1-2 and 2-3. I want a quicker and almost "invisible" feeling shift. The best way I can describe how I want my truck to shift is like the 8-speed in the newer Rams. They seem to have those things tuned perfectly from the factory. I don't know if these are unreal expectations or if I'm being too picky, but I have gotten my truck to shift almost perfectly similar to those before, but the shifts always seem to kinda get sloppy after a while.

Here is my current tune file, I will take any and all suggestions! Or I would love to compare files with any other stock trucks that have gotten their trans tuning to perfection.
I would also like some suggestions on TCC changes. I havent changed anything except that the TC locks in 5th and 6th only. I have to mash the gas pretty hard to get the TC to unlock.

Thanks for any and all help!

NathanSierraTuneShifting_Wot23.hpt

[5FDP]

The shift time torque adder normal tables, that is where you can make the shift quicker. For gears 1-4 just look how they are setup, you can scale the shift times down across the whole table. For the higher torque and higher rpm area's I'd stop at .3000s for a heavy truck. If you look a the 1-2 shift they are around .3800-.4500 of a second at higher rpm and the part throttle shifts are pretty slow too, so you can make all of it quicker. Do that for the first 4 gear shifts.

Then go to the on-coming pressure preset tables in the adaptive page. Take each value 0,1,2 and add 10% to each for starters, don't go crazy here.

Anytime you change those presets and stuff like that you need to reset the adapts in the transmission after flashing. So make the changes, flash the truck, then open the scanner BEFORE you start the engine, connect to the truck and find the special functions window, click transmission and then click reset and preset for the adapts. Then start the truck and go for a drive, the first 15-20 shifts or more will feel clunky as it relearns the new settings. Do some more driving and see how it feels.

[naterosalez]

The shift time torque adder normal tables, that is where you can make the shift quicker. For gears 1-4 just look how they are setup, you can scale the shift times down across the whole table. For the higher torque and higher rpm area's I'd stop at .3000s for a heavy truck. If you look a the 1-2 shift they are around .3800-.4500 of a second at higher rpm and the part throttle shifts are pretty slow too, so you can make all of it quicker. Do that for the first 4 gear shifts.

Then go to the on-coming pressure preset tables in the adaptive page. Take each value 0,1,2 and add 10% to each for starters, don't go crazy here.

Anytime you change those presets and stuff like that you need to reset the adapts in the transmission after flashing. So make the changes, flash the truck, then open the scanner BEFORE you start the engine, connect to the truck and find the special functions window, click transmission and then click reset and preset for the adapts. Then start the truck and go for a drive, the first 15-20 shifts or more will feel clunky as it relearns the new settings. Do some more driving and see how it feels.

Hey, thanks for the reply. I raised the 1-2 and 2-3 times for the higher rpms because it was a very firm shift, almost harsh at WOT (Had them around like .32). The dash would shake pretty heavily and I don't like that feeling.. I may try to lower the regular driving speeds slightly. I am not very familiar with the pressures, but I was playing with them when I first started tuning the transmission, but the shifts always felt funkier when I messed with the pressures. I didn't make any changes with the TM while also having higher pressure values, though, will that make the shifts better?

Also with the pressures, do I need to make any changes to the offgoing pressures?
Should I mess with the upshift pressures at all? I know I was changing the 2 lower torque tables in the past.

Thanks for the help!

[5FDP]

I don't touch the off-going pressure and I also don't really reduce the torque mngt like you did.