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Boy that was an expensive book to buy, but I have realized now that I really didn't do a whole lot of good, in face it made it worse. Thank you for the help, I will be adjusting the minimum spark...

So I found a youtube video that goes over a lot of the 6L80/90 trans tuning, I believe I searched for "6L80 tuning" on youtube. He basically confirmed a lot of what I've been reading on these forums...

I recognize all those settings you have, we definitely referenced the same tuning guide. Honestly from what I've been experiencing the last 6 months of trying to figure out the rough shifting here...

Sounds good

I?m used to tuning the 4L60?s, and apparently taking TM out of these 6L80/90?s isn?t the thing to do. I?ve been fighting this harsh shift for quite some time and it?s getting old

I re enabled all TM in the transmission settings, used a few different people tunes through the search function as a reference for volume presets and pressure and what not, just flashed it and...

Another scan just after reflashing and resetting trans adapt in the scanner.

90099

This was my tune file with Transmission master Enable/Disable "Disabled" for upshift. Shifts fantastic with the exception of the 2-3 upshift, feels like i'm being rearended under partial throttle...

I accidentally posted in the V8 Engine Tuning section.

A little bit of background, I had a decent amount of experience tuning the Gen III 4L60's, and when I purchased my new 2016 sierra with the...

Did you ever fix the 2-3 upshift flare issue? I have a 2016 GMC Sierra 5.3 A6 and I'm having the EXACT same issue. Did you ever get it fixed?

I have shortened the shift timing a pretty good amount, and with that brings the opposite, yes a quick shift, but you can tell the throttle is closing in between and the truck losses all power for...

I re enabled all the rest with the exception of the master. My tuning book said to disable that. Previously I have tried the settings with adding line pressure and things like that with all tm...

I have done that and the problem goes away. The problem is literally when I have the master enable/disable for torque management disabled for upshift. The frustrating part is I absolutely HATE the...

I have added some to oncoming pressure presets, I added line pressure, absolutely NO improvements. Seemingly no matter what I do to anything in the trans tables it still shifts exactly the same.

Made these adjustments, previously you had mentioned to lower the oncoming pressure presets, so now I raised them back to stock values. Shift speeds are just about what I want. Also set the torque...

Low all "0's", Mid all "221", and High all "443" lb ft of torque in every gear/cell. Oncoming Pressure preset for 2-3 shift as follows: 0 cell = 36 psi, 1 cell = 44 psi, 2 cell = 56 psi. These are...

I have "low" "mid" and "high" threshold tables, i'm thinking this might be the issue, i'll attempt to adjust these tables and see if there are any results.

Currently the discrete shift torque is enable on 1-2 upshift and 2-3 upshift, all the rest and "0" (disabled). Being that 1-2 and 2-3 are a "1" for enabled, wouldn't that mean it should have a...

89929

Attached is the latest scan after making substantial changes to 1-2 upshift and 2-3 upshift on pressure with no results. Seemingly taking even a large amount (in this case over 20 psi of...

Thank you for the insight. I will be attempting some adjustments today in the tables you referenced. I though for sure I've adjusted these table previously with no improvement, but i'll try it...

under transmission "torque reduction" which is the master enable/disable for torque reduction on upshifts. When I disable that is when I get great shifts on all upshift EXCEPT 2-3. Again, although...

Thank you for the quick response, and i'm hoping that's the case because I seriously am happy with the tune with the exception of that one shift. Very frustrating. Any help would be greatly...

89812

A little bit of background, I had a decent amount of experience tuning the Gen III 4L60's, and when I purchased my new 2016 sierra with the A6 I was blown away at the amount of tables in the...

Hello all,

I wanted to pose this issue I've been having and cannot seem to resolve it. I have been tuning my own personal trucks for years now (BTW I have HPT), first started off with a 2004...