Hi, The biggest problem with Molybdenum Disulfide grease (MoS2) is when it comes to any item with really close clearances that it is so slippery and or particle size, that it causes the rotating elements wether balls or rollers, to slide rather than rotate causing failure in the end, we stopped using it in truck universal joints years ago, brillant for shackle pins thou......regards wayne davidson Invercargill NZ.....