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Re: 4L80e TCC Issues / Tuning.
Couple possibilities. If your getting false knock at all from a cam swap, the TCC will stay unlocked thinking there is an issue. If thats not the case, then your trans tuning needs to be adjusted. Its possible that your lock and unlock are set at conflicting interval.
Luckily that part isn't the hardest thing for a tuner to mess with. Barring some unusual mechanical problem that is. I don't know WHY they would have messed with the lockup settings drastically (usually its way more common to get "tunes" with the trans tables completely untouched).
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING 
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