Well smwmustang....

I have the same issue. I just rebuilt my transmisison. I have the 3.0 so i have the gm 5l40e tranny. I also ordered a re-manufactured torque converter. Now when i get on the freeway i get that same code as you P0741 or bmw code 48. I did the same test as RRPhil had said which was at 60-70mph when i lift my foot off my rpms drop to 1200-1500. Now the question i have Phill can it be the tcc solenoid? Should i drop the pan and check it before removing the tranny again for the torque converter? I bought my torque converter from Torque Converters - Precision of New Hampton. any thoughts?