404 Gearbox. 2004 NT404 Forum › Forums › Help Me Find A Part › 404 Gearbox. 2004 NT404 This topic has 1 reply, 2 voices, and was last updated 4 years, 2 months ago by DavidPrivett. Viewing 1 reply thread Author Posts August 21, 2020 at 11:06 am #49450 Courtland BellParticipant Offline The entire back piece of my “gearbox” has broken off. This part is under the seat, 21” long, 9.5” wide and 8” high. 8 bolts total. Tractor useless without it. Anyone have a 404 with shot engine for example. Help! August 22, 2020 at 8:30 am #49452 DavidPrivettParticipant Offline If you have to is there a good welding shop that can if need be put it the housing back together, cast is tough to get it welded right. Author Posts Viewing 1 reply thread You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In