Yup, Takins and Yaks are in two different subfamilies, with Yak (Bos grunniens) being in the subfamily Bovinae (Cattle and Spiral horned antelopes) and Takin (Budorcas taxicolor) being in the subfamily Caprinae (Goats and Sheep)
In fact the 4 recognized subspecies of Takin (Budorcas taxicolor) are their own full species now