2004 KIA Sedona

109K and runs great except for when accelerating from start to any speed. The front end acts likes the front wheels are slightly out of balance. Once you stop accelerating all is fine. Tires have plenty of tread and no I haven’t rotated them to the rear which I might do if nobody has had a simular problem.

Sounds like a bad inner CV joint. The motor/transmission mounts should also be checked.