the other cv looks ok, then i pulled the diff out because someone thought i had a lsd or locker in the front which i had no knowledge of when i bought the truck and it turns out it is a welded front diff.

i have checked all the splines and the diff for any chiped teeth and there are none. so my question is should this just be the case of swapping the left cv with one that works? and also can i swap the front diff with the rear as i want a locker in the rear not the front.
thanks.
martin