ive checked many different vendors including cobra. They have all the parts for the atc500. Very few for the nv and none for the lwx. No one has a chain either and one vendor mentioned he might have one in june but not going to hold my breath. Im going to confirm that (i hope) the 5hp24 only had one output shaft version which if thats correct means the coupler shaft between the trans output and tcase input should be able to work with my trans. not sure if the tcase will come with this coupler but i would hope so lol.