Does this look weird, or normal?
Stock 4L60E, mostly stock tune. I haven't messed with shift timing or pressures yet. I did try adding and subtracting TM (+/- about 40%), didn't notice any change. Both abuse mode tables are untouched. Yes, that horrible 1.0 second shift duration is on the to-do list.
Timing goes from 18* to -1.x* during the shift while showing 'none' for both TM types. The advance & retard graphs don't change when the timing is being pulled. What's causing it?
edit: 'Desired Trans Torque' drops from 12 to 0 when it happens, that's the only change I can see.