ps: What I feel is best.
I do like mobil 1 VTwin in the engine, mainly because it's easy to find and I believe it's a top of the line synthetic.
I like forumla + or a good primary lube for the primary
I like the spectro 6 speed trans fluid or redline SP for the transmission
Excellent choice IMO and I agree.
I have a buddy that is a tech for HD up north and he has had a few trans rebuilds running Syn 3 because of problems with the shift forks being blued on tear down. I don't know what the symptoms were before the tear down but he didn't like what he saw when he got into the transmissions that were all running the Syn 3.
Glad to help you Chopper and hope you found something interesting in the link for the MSDS.