I have stock transfer (203 I think) and have noticed a chatter type nose coming from shifter on floor when driving. It seems to be getting louder or maybe I need to turn up the radio. I have had transfer case serviced several times over the past few years. Could this be normal type noise or could it be the start of something? I assume the correct fluid was used the last time I got it serviced. Is there a fluid additive as used in my limited slip diff to maybe cut the chatter noise down or should I have it opened? Maybe it might be a good time to replace. I value everyones comments. I have used many comments and info tips from past postings. Thanks in advance. Harry, Escondido, Ca.