My car is a front mount turbo setup it was tuned with a T56 but did a 4l80 swap with a manual control box. Do I need a retune? The car feels fine I've looked at the Air/Fuel ratio and they are at 10.9-11.2 when I did a pull. Thanks

 

Your lower rpms cruising will have a different load on them due to the clutch being 100 locked and then now a converter being looser depending on how loose. Same with the whole RPM band really. I did the same swap and if I remember right had to tweak the whole chart...but at the time I had a shitty TCI converter that blew through like 1000rpms.