Hello people!

I have a 2000 Ranger xlt 4wd 4.0 cyl. Recently I had the entire engine rebuilt. At 95,000 miles it has been running great until just the other day when I heard a low tone metal grinding noise which seemed to have come from underneath the driver.( Not totally sure) What do you hink is going on here. Could this be something I can handle myself to save $, or should I take it to a professional. I am afraid I have to pump money I do not have into my truck again. Any suggestions? Thanks in advance! Mark