I had about 7 1/2 years as part timer. How do I figure out my pension benefits for this period? The last 4 of those years as a "cover driver" I worked over 40 hours a week. Does this mean anything? I plan to retire at age 57 or 58. The Central States calculator says about $2000 a month benefit at 57 and $2250 at 58. Why do you have to work at an approved job after you start collection from Central States? I could understand if you were taking a full time teamster job. But this seems like discrimination. I guess I will have to sell stuff on ebay, move overseas, or work for tips because I wont be able to afford to retire in this country on the above projected amounts.