Thats what I. Thought...I'm beginning to think this might be something I will have to live with..truck has just over 200k on it..might just be normal wear and tear..haven't had time to check front differential fluid (been turning cold up here) I have to take in for grease job anyway I'll have them check it while doing u-joints ..I'll keep ya posted on what develops ..doesn't seem to hurting truck...thanx for your input