Alright, simple question. I just changed all the fluids on my 2010 electraglide classic. I read a whole bunch of diffrent threads on different types of oil and weights and so on. I heard people using redline in the tranny, amsoil oil, mobil one and on and on. So, I wanted to keep it simple and didnt want to have to order anything by mail or go to three different stores. I just went to the dealer, bought syn3 for all boxes, harley filter and o ring, primary gasket kit and called it a day. Got my 10% hog discount and just did the work. People around here say they use syn3 all the time with no problems. Anyone out there do the same, and problems with syn3 in the tranny case?? I figure I can run it for a while and always just change it if I dont like it but im going up to Americade next week and wanted to just get it done. Also first time I changed all the fluids myself (easy stuff), just got bike in January, bought with 2k on clock, now have 5400. Dont know what was in it before hand, bought from dealer so another reason why i wanted to change it also.