My cousin has a 2000 3500 CTD and I read somewhere that there is a gear or somthing on the front of the motor that can come lose and mess things up. Is that true? If it is what is the fix for it. He is pushing about 220k and has put alot of money into it in the past six months or so. I would hate to see him

If I could warn him of somthing. Thanks in advance, Dale