The link to the article I posted, on your first thread about the k1, shows a part number for the b2
go to the dealer parts counter, give them the number
alternatively, Phil can get you this part
it's that easy
the article explains where the b2 is and how to remove and replace
again I'm posting the b2 article
read the article thoroughly
http://articles.mbz.org/transmission/b2/repair/