727 question

Transmission was completely rebuilt Put in new converter stall 3200 shifted fantastic.Drove it 25 miles. Put different stall converter from another company in it with less stall and noticed on the first shift from 1-2 was much softer and slip between 2-3.Adjusted bands to 72 ft/lbs and backed them off 2 turns.Took pan off no shavings or anything else.Took valve body out and inspected it,looked fine.Put it back together same thing.Also made sure kick down was correct.The only thing i changed was torque conv.Guess will pull it out this week end let tranny guy check trans and put different conv in.