I have the CD that is a repo of the 14 /33 parts book and it says as follows DD up to engine #30414 and after 35711 DE,DF,DG,DH up to engine# DH4186 DG,DL,DK,DO. Part #78439 DH after engine #DH4186 DIafter Engine DH 4186 DJ Part # 320430 I hope this information is of help to you Cheers Ron