If there were a lot of inside full time jobs available, I would imagine that most full time seniority drivers would gobble them up. Your length of time in waiting for your seniority to come up to go full time driving depends on how big your center or hub is. Obviously, if you work in a small center it is going to take much longer than at a larger (or an "older" center with more drivers closer to retirement age) center or hub. Good luck.