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This makes me think the values have very little effect on the way it shifts. But people say adjusting the oncoming preset volume should be done when using additional clutches, etc. Seems to me...

So I'm trying to gain more knowledge with tuning 6l80s and have made on observation that doesn't make much sense to me. I've got a 2009 G8 and a 2015 Sierra, both with a 6l80. Internally they...

This is exactly what they told me they had to do. Either way it is successfully programmed and doing what I need it to. Talk about a PITA though.

No glaring issues I can see with the tune. What power level is the transmission built to hold? I only saw a couple small things, your adaptive pressures are a bit higher than normal. The shift...

For future reference, this turned out to be an issue with GM software. Sense switching to a new program, they have had a lot of issues with TCM/ECM programming. They had to call their tech line and...

The preprogrammed TCM allowed me access to write it but wouldn't shift and stayed in limp mode while giving the u0101 code. I attempted to use the os that came on it using all my time values first. ...

I'm fighting an issue with my g8 and am out of ideas. I'll try to keep it to important bits. The transmission locked into 4th after a pull and threw a P0797 for solenoid c stuck on. While trying...

Your current tune is calling for auto upshift at full throttle with TUTD. But your part throttle is set to hold the gear till 312mph (never shift until you tap up). I've adjusted the part throttle...

Thanks for the input! I struggled finding real information about what, how and why TCC stuff needs to be tuned. I've also seen some info stating the virtual torque table needs to be adjusted but no...

To update this, the transmission from GM would not program (at least the guy the shop uses couldn't get it to). So I'm now building a Circle D level 3 kit with my core. Pulling it apart, I haven't...

Right, the solenoid is locked "on" which I believe makes the 4-5-6 stay engaged. Which is why we think the tchm failed (or solenoid inside). I just wanted to see if my tune looks ok or if I did...

I will try to put all the useful info in here to start. The car is a 2009 G8 with a LSA blower. The car makes an estimated 650-680whp. I put approximately 14k miles on the bone stock 6l80 with...

6l80 vs 6l90 tunes are a bit different from the factory. I've got my pressures looking pretty close to your 6l90 tune. Only thing that caught my eye on your tune was your max line pressure table. ...

Bringing this one back, cause I was curious and looking at your tune. I'm no expert, but I have my g8 6l80 shifting quite well. I noticed under adaptive, your oncoming volumes are all jacked up...

https://forum.hptuners.com/showthread.php?62838-Injection-Timing-Assistance-Requested

This thread will help greatly with getting your injector timing correct for your cam. Cuts down a bunch on...

Thanks for the quick check over. I changed the IVT terms and min pulse width. Everything else matched up to the ID website, not sure how I missed the .300 min when I first set them up.

The...

Thank you both for the tips and that link, they helped with everything I was needing! I've got it idling even better and have cured the pushing and coasting issues. My timing was too high and my...

So I got the idle in park looking good. I adjusted the injector timing with the help of the huge thread on here and their awesome spreadsheet. That helped a bunch with fuel smell and adjusted AFRs...

All my reading on tuning bigger cams has led to having false lean at idle due to the overlap and amount of unburned oxygen flowing through at low RPM. It also smells super rich at idle so I have no...

I didn't mention injectors in the post but I'm running ID 1050x with all the data from the factory added. They were installed on the stock motor and everything was in line and running well.

To prefix this, I've done a lot of research, reading, watching Goat Rope on YT and have a good general understanding of tuning. I'm still getting used to HPtuners platform, came from DSM world.
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