I had the same problem with my 2004 Heritage not too long after I had bought it new. I had it serviced at dealership and they had put in SE oil in all three holes as advertised. The next time I changed oil myself and used Amsoil MC oil in all hree holes and problem went away, I have also used Mobil 1 V Twin in all three holes with no problems. Thru the advice of many people in this forum I have started running 75/140 in the trans. now, it does shift a little better and is a whole lot quiter. I've also read somewhere that at one time there was an issue with the springs in the trans., but I would try the oil thing first and see what happens, it's a lot cheaper and easier.
