Long story short, sold my built motor and everything with it minus the tranny/rearend that's built. Put a lmm motor back into my 05 lly, stock fueling, and decided to go back lb7 turbo instead of the vvt. Also kept my technicooler. Trucks only used to haul my camper/boat now. Not sure if it's bc my trans tune is for a 05 or what but with the lb7 turbo my trans never seems to be in the correct gear when towing backroads. Always lugs out and takes forever before it down shifts then wants to scream. Does fine unloaded tho. Lb7 trans respond properly from all that I've drove which is why I decided on the lb7 turbo setup. Should I get a trans tune or just get a tapshifter? If trans tune who is the best on them? Trucks running ppei tuning currently, but stock trans tune. Thx