Car is 2010 camaro ss, tvs 2300, cam 224/236/.646/118, oem 6l80 and stock converter. I just recently replaced my 3,000 stall with a stock converter. My issues are the engine rpms dpop to as low as 650 rpms during coastdown down shifting from 4-3 and 3-2 accompanied with spark surging from +5 to about +19. Any help would be greatly appreciated.
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