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I actually had a new converter put in. It was a HD according to the trans shop that did it. I was hoping to get ahead of any issues and let them do the tear down to replace anything that was...

Greg,

Thanks! I'll take a peek at this. The engine side stuff came from a tuner, and I haven't really messed with it. I just pulled his engine tune into HPT, and mated it up with my stock trans...

I probably missed it, but what vehicle are you driving? The buck/jerk is something I also experience in my 2016 yukon with the 6.2 and 8L90

Just remembered to check back here. That's so weird! I've never seen it not that way. Do you have a stock file that you could send me? I wonder what else is different and how the MPH winds down for...

I did more research and found that many recommend (or it's at least necessary) to do an adapt reset / adapt preset after pressure changes. I adjusted some pressures on the 3 to 1 downshift, ran the...

I'll get one in the next couple of days

Finally getting back to this. I've tried putting the tune back to stock with no success in this being fixed. Here is what I currently have setup in the tune.

I'll have to check that out. Do you know where I can find that software?

Yeah. Stock was the reason I started messing with it initially. The only thing that has gotten anywhere near a better feel is going 3 > 2 > 1 rather than 3 > 1.

Tune file attached

131492

I have tried everything I could between google and here to get this 3 to 1 downshift to quit lurching/jerking forward when coming to a stop. It's clear in the logs it happens at the moment it shifts...

I'll check there. Thank you!

Anyone have the stock file for 8L90 Yukon Denali w/ 6.2? I saved mine but i had to restore the backup from my Diablo tuner first. Just concerned the file is saved wasn't the stock one but don't know...

I recently had my transmission completely rebuilt and the shop put in a heavy duty torque converter. It's much louder than the stock when it seems to be locking/unlocking -- specifically on higher...