Erratic Shift Points
 

I'll take this over to the HPTuners forum in the morning and post up some logs and tune files, but I am a bit confused. I started to have some erratic shifting during WOT a while back. I recently put in 3.73 gears and made some adjustments based on I think bluecats spreadsheet for the 6L80. i also played with the old tune and just changing the final drive gear.

It seems that regardless of what I do I am getting shifts as much as 1200 rpm at WOT beyond my rpm and mph settings. Yes, this is having all the tables match and not just WOT. If I set my 1-2 up shift to 5000 rpm it shifts at about 6200 rpm. Then 2-3 up shift is worse and at a shift point as low as 4800 rpm with matching mph it will still bump the rev limiter at 6500.

As I will readily admit I don't know much of anything about HPTuners yet, I am trying to learn and read as much as I can find. I am just curious if this is something I am doing with the tune, or if this is a sign that my 6L80 is about to take a dump.

Try and lower your mph settings.

I'll look into it again, but both MPH and rpm were both lowered. Logged runs showed I was way over on both mph and rpm before the shift occured.

Are you running a real loose converter?

Stock right now. Going to a 2800 Circle D in a week or so.

Sometimes I have found starting over takes a lot of headache out of it, go back to stock settings, then change gear ratio, then set desired rpm, test drive to see where it shifts at and adjust mph accordingly