veezee

Hi, car has a 6.0 ls with drive by wire throttle body, t56 with mcleod twindisk and truetrac diff

Under WOT randomly it's like the car is shuddering and trying to go but just won't go anywhere, like it't towing 100 tonnes or something! most often while soft launching or just after a shift. What could this be?

It's still reading good AFR so it's not losing fuel, replaced plugs, leads etc, thinking it might be either ecm, crank angle sensor, o2 sensors, or even the diff/gearbox binding up?! Very strange. Would any of these things cause this?

Thanks for your time!