I have a clunking and grinding sound coming from my front passenger wheel when I put my ranger in 4wd. After reading up on it on here, I am pretty sure I have a bad ujoint. I just bought the ranger and am pretty sure they have never been changed. Am I correct in my assumption of a bad ujoint? I have manual hubs, I locked them with out the 4wd and still got the sound. Any help would be appreciated.