2005 ext , did the whole front end over with Detroit axle , all good except the right side upper control arm rear bolt. Few days after I did the job I went to check and had an “I’m an idiot moment” because the bolt was half way out thinking I didn’t thread it all the way in. I tightened it down and all was good. Something made me check today and guess what. It’s backing itself out AGAIN ! Did I miss something ? Thread lock ? Driver side is fine.