How many miles on your bike? Have you seen the recommendation from Honda to leave the factory fill in the rear end for a prescribed number of miles? I think it's 20,000 or so.[/QUOTE]
Bike has about 11,500 miles and this is the second rear end change.First was at about 500 miles because I had read on the Goldwing site that a lot of Goldwings were sent of to there new owners with the rear end low on fluid.So I checked mine and it was very low-Great Honda techs at my dealership never checked it so I drained what was in there and refilled with Honda brand fluid.Now I went with Amsoil severe gear as in my Dodge cummins it has served the diffs well and has 50-100k intervals.That truck has 200+K on it with no problems-Also run Amsoil in the engine at 25k intervals.As far as this special Moly in the bike new I call bunk.It's gears spinning and any good synthetic fluid will give you years of sevice.Funny thing is I already have a brand new F6B rear end in the box from a trike take off that I got on E Bay for 90.00.So if this rear end grenades I'm set for a quick change out.Only time will tell if I have done the wrong thing here but a lot of 1800's have gone 100k+ and they changed there rear end early and more often too.