Trans is shifting way too smooth. Why?

I took it out today to play with the new 4.10's. It was shifting really smooth under hard acceleration, it almost seemed like it was reving in between shifts. There was hardly any kick. I was getting some convertor shudder last year but thats seemed to of resolved. Can this be the convertor getting ready to go out?

By the way those 4.10's are crazy. On street tires I got rubber through first then when it went sideways half way through second. I had to get off before it got traction. Forget the 3.73's if you have an auto ragtop. Go for 4.10's!!!

Anyone?

Never thought about that. It hits nearly 6K before it shifts now. It used to shift closer to 5-5500. But gears alone shouldn't do that right? I also used a Jeep 23 tooth speedo gear but again that shouldn't have anything to do with it.