4l80e TCC trouble

[rossp]

I have a 99 silverado with a 4l80e and a 3400 converter. All of a sudden i have no lockup. The converter isnt even a year old with 5k miles on it max. Under normal driving conditions After the shift into 4th gear at about 46 mph i can feel what seems like the converter locking up but more throttle reveals its not locked. I have attached a short log and my tune file. Could you guys tell me if something is off in my tune or if my lockup clutch is possibly toast? Thanks

[joecar]

TSTATE10 shows "TCC off due to minimum throttle".


Can you also log TP.

[rossp]

Here is the log with TP added. I dont know a whole lot about the trans side of tuning or diagnosing but it looks to me like everything i'm logging is working properly.

[joecar]

Log 6-25 shows TCC unlocking when TP goes to zero.

[joecar]

Remove TCCP, TCCPCSC, TCCECC, TCCCCCP, DTCCOUNT;

Add TCCSLIP, TSTATE09, TSTATE12, TIS, TOS, GEAR;

( keep TP )

( pid channel count should now be 24 )

Capture another log.