transmission 5 speed to 6
 

I am still looking for an answer to transmission match up , can a 2007 road king 6 speed bolt on to a 2006 road king (tranny case match engine case to bolt it on) and same shaft and pully size ?

I can't say for sure but I don't recall any changes in the frames or cases that would get in the way. It would probably help to ask some techs that work in a shop big enough to have done some removals of both. Most techs would recognize and remember an differences. You might also consider a Baker 6 speed kit. I don't know much about that either but it has been discussed somewhere in these forums. Bes of luck.

No completely different, major problem oil is fed inside on 07 and up, outside on 06 and earlier.