Rock Assault™ Axle Fill / Inspection Cap




Extra large differential fill and inspection cap. Designed to allow quick access for  inspecting the ring gear. Features 1.5″ diameter access hole. Threaded aluminum cap uses a rubber o-ring for a tight seal. Installation requires cutting a hole in to the top of the differential housing and welding on a threaded bung. Kit includes: one threaded bung, one cap and one o-ring. Plug kit can be ordered loose as a do-it your-self install or it can be ordered installed into a housing if you are ordering a housing at the same time.

Available options:

  • Rock Assault Inspection Plug Kit – Loose, 140184-1-KIT
  • Rock Assault Inspection Plug Kit – Installed, 140188-1-KIT

Additional information

Weight 0.60 lbs
Dimensions 7.5 × 7.5 × 3.5 in

Vehicle Type