I have done extensive research to try and avoid having to post on this but I'm at a complete loss. Above 25mph I get a buzz/ rattle from that area of my transfer case in my 1974 FJ40. The sound goes away if I just push down on the shifter ever so lightly. I have gone through the entire linkage system and made sure all the correct wave washers are in place and everything is tight. I have also put a small piece of rubber between the linkage and the shift shaft because I know the design can cause the contact there to rattle. Is it possible I have the linkage too tight? Am I missing something I haven't thought of. I'm not 100% that the noise is coming from the transfer case but I only assume that because it stops when pressing down on the shifter (and it do mean lightly. It doesn't take much). Any help would be much appreciated. Thanks!