jarjarlol

I get lockup if I drive before the car is warmed up all the way, but once it's warm it won't lock. I can command it with VCM scanner special functions but thats it. Trans didn't run over 150 degrees during the test runs. I'm wondering if there's something in the tune I messed up (posted below).

2xLS1

iTrader: (25)

I haven't upgraded to 3.0 so I can't look at the tune but I would log misfires. If enough are detected even if false will keep the converter unlocked. Misfire detection is also coolant temp controlled so it doesn't start until warmed up.

Drj8787

my.... in and out of lock up on the hwy problems were solved with the misfire table fix I just followed the instructions in the write up that is a sticky.

joecar

Check for misfires as 2xLS1 said.

Also, there are some state pids you can log that show reason flags for TCC unlock.

Also, ABS has the ability to report "rough road" to the PCM which causes TCC unlock, this would show up in the state pids.