We recently had a full-time driver retire from our center. (November) I am the top seniority TCD and signed the part-time to full-time bid list in Jan. My Sup filled out the paperwork for me to become FT to take the drivers spot who retired. Found out last week that I was denied the FT spot b/c our center has enough drivers. I have driven everyday this year and am on pace to get well over 200 punches. Supervisor had to deliver packages today because we had no other drivers. Last Friday we had to get a driver from another center to help us. I am a teamster. Is there anything I can do. How would I word my grievance?