The Eaton Fuller Input Shaft, part number 1004105, is a genuine Eaton Fuller manual transmission component. The input shaft measures 17 inches in length with a 5.5-inch profile, making it a direct-fit replacement for applications calling out this part number. It falls under the NMFC classification for transmission and clutch parts, confirming its heavy-duty truck drivetrain application. Pro Gear and Transmission carries genuine Eaton Fuller transmission parts. Call us to confirm this is the correct shaft for your transmission before ordering.Interchanges:HF1004105FeaturesGenuine Eaton Fuller manual transmission input shaftPart number 1004105Length: 17 inchesProfile dimensions: 5.5 x 5.5 inchesClassified under NMFC 121875 for transmission and clutch partsSold by Pro Gear and TransmissionTech SpecsPart Number: 1004105Length: 17 in.Width: 5.5 in.Height: 5.5 in.Unit of Measure: EachNMFC Code: 121875 – Transmission/Clutch Parts