4l80e 1-2 brutal shift

[Diezl7]

03 chevy silverado SS i segment swapped a 4l80e in.
3600 stall converter with a transgo HD2 kit, All stock other wise.
Sent log and talked to transgo tech support because i figured a .100" hole in the (1-2)seperator plate was too big but they believe it is a tune problem commanding crazy high pressure after looking at the log.
I'm sure the tune is ugly, but was wondering if someone could take a look because i feel like something isnt right on the 1-2 shift. It chirps the tires on a 1/2 throttle and its just a stock lq9 pretty unpleasant.

[Alvin]

The shift pressures are maxed out. My advise would be to start with stock pressure first.

[RDF1]

I had a stock 2003 2500HD tune open so i copied over the stock pressures for you to try.

[Diezl7]

Thank you i will try that and report back.

[edcmat-l1]

Even with stock pressure tables it's gonna hit pretty hard with that shift kit.

[RDF1]

Even with stock pressure tables it's gonna hit pretty hard with that shift kit.

Especially with a .100 hole in plate and if they used the Transgo accumulator springs.

[Diezl7]

Transgo told me since the converter is so loose .100 wouldn't be a problem. Talked to a couple guys on other forums they had to go a little smaller with the 1-2 hole though. The other shifts are really nice at .100 just not the 1-2.

Transgo: "yes it seems to be a tune issue, here’s screenshot of the data where you can see the TSS is not reading (only the 60E has that) , it shows a 3-2 downshift PWM solenoid that does not exist in a 4L80E, and it thinks the lock-up is slipping almost 2000 RPM since the TSS remains at zero all the time when in fact it is locked up solid. You can also see in the red circle I added where the computer is commanding really low amperage (which equals to high pressure) in 1st and 2nd gear up until it is about ready to make the 2-3 shift."
image002.png

[Diezl7]

Also thank you RDF1, i didnt realize you put them into my tune been sidetracked with another project i need to try that out asap

[RDF1]

So you dont have the TSS connector wired in?
4L80 has it right above the shifter shaft.

[Diezl7]

Yes I do, trans is from a 96 if that matters.

[RDF1]

Are you sure you have the TSS wired to the PCM correct pins?