OK so thinking!!!! the orginal silicone grease for teh b4.2 diff only last 15-20 runs, i mean fast runs going for wins now. But 15-20 runs is kinda ridiculous that is nearly now the mount of runs you want to get out of a diff for replacing it for a FRESH ONE FOR AROUND 25$!!! Right? So here is what i had in mind, I am setting out to find the ULTIMATE REPLACEMENT, yes i am going to do all the hard work for you!!! I am going to try black grease in the diff, losi great grease, Team asscoiated silicone, bfast silicone, mobil 1 syntheic, and whatever else i can find that might work!!!!! For updates I will be posting on here if i will find a different way like youtube. IF YOU HAVE ANY IDEAS OR SUGGESTIONS OR ANYTHING ABOUT WHAT I SHOULD TRY PLEASE QUOTE ME AN ANSWER!!!