I have a 96 chevy truck with a 98 7.4L and 4l80e swap. Everything works fine with the swap with the exception of converter lockup. With a stock trans tune (speedo and calculated speed untouched) the converter never attempts to lock. If I decrease the tcc apply tables I get a rapid lock/off condition at light throttle. No DTCs...Thanks for any help. Tunes and logs attached. At this point I would love to have a tune that simply forced the converter to lock to verify operation thru the pcm. I was able to ground the pwm pin at the ecu to force a converter lock.
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