Hmmm- thanks for this input.

I can verify now that if I go back to a stock MEMCAL- the line does not pulse. Of course my 454 doesn't run so well on a stock 350 MEMCAL... put the TCC line doesnt pulse!

One question maybe you guys know... if by chance my MEMCAL has code from a truck that had a PWM TCC setup- like a 95 or 96 (mine is a 94)... do you know if that code would pulse the grey/black TCC lockup wire or was it only supposed to add pulsing (PWM) to the PWM TCC wire. My harness does not even contain a wire for the PWM TCC line... but I am wondering if somehow the guy who did my tune may have started with a 95 (PWM TCC) baseline...

I did a tunerpro compare of my purchased tune against an original bin that does not pulse... and I didnt see anything transmission wise that jumped out at me... for example... the TCC PWM bits were all set the same... so this comment about corrupted code etc... is sort of interesting to me!