4L60E - Strange TCC LogFile - TunerPro

[kevinvinv]

Hi All,

I am working to diagnose an issue on my 1994 chevy. I've got a 4L60 from Finish Line Transmissions in it and a 454.

The TCC seems to be going in and out an awful lot... I've been messing with the thresholds using TunerPro and I seem to have been able to impact things when the engine is cold but when it warms up... still have some wacky things going on.

Attached is a short trace from TunerPro. What I noticed is that the TCC ON and TCC FEEDBACK flags are sort of pulsing on and off all the time... even when in park and not moving.

I dont see this same thing with my old scan too so i dont know if it is a tuner pro issue or if it is real. In anycase... if anyone has the patience to take a quick look or offer an idea or two- It would be greatly appreciated.