awd transmission

Hello All, just got an 03 AWD eddie bauer, it has a rebuilt trans about 10k ago. I pulled the front drive shaft and it has issues of high revving/rpms and the speedo climbs to about 20-25mph as the explorer slowly rolls forward from a dead stop. once its rolling and moving it seems good to go...

My 99 Explorer AWD 5.0 liter has exhibits a transmission stutter when in high gear (overdrive) during acceleration from low engine speed. most prevalent at 40-45 mph with engine speed just below 1500 rpm. If I lightly press the accelerator pedal to accelerate without causing downshift, I feel...