05 T&C Transmission slipping

My transmission is slipping when the engine is cold. Fluid levels seem fine. I do have a fluid leak that I monitor and add fluid when needed. It's an 05 touring with 167k miles. Any thoughts?

Could have a shop read the Clutch Volume Index (CVI) values. They are an indicator of clutch pad condition amongst other things. If they are out of spec you may need to rebuild the tranny.