I had the drive belt replaced at 76k miles, also all fluids flushed. Do I really need to do that again, as they are recommending? Also, my A/C is no longer working. I had both O rings replaced and the A/C recharged in 5/09 and had it rechecked in 4/10 because I thought it was too warm. They said it was cooling at 41 degrees, had no leaks and freon was full. It started blowing cold and then getting warm since then, and now only blows warm air. Any ideas?