u/Chemical_Ad9087

I just bought a used truck with a jasper 48re transmission installed 20k miles ago. It’s described as a “three clutch transmission”. I’m not what exactly the “three clutch means”, is that normal or an upgrade ??? For reference it’s a 5.9 4x4 2005 automatic. I tried calling the dealership for info but they weren’t the most help. Also it shifts a little hard and I’m not sure if thats the three clutch or if it’s going out. Thanks for anyone that can help