Nut - Mainshaft for Series 3 Less 1 Ton – 217477

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The mainshaft nut is a critical retention fastener securing the mainshaft within the Series 3 gearbox assembly. It maintains correct axial preload and prevents longitudinal movemen t of the mainshaft under load, which if lost can result in gear engagement problems, bearing wear, and internal gearbox damage. Using the correct replacement nut ensures proper torque retention and thread compatibility with the original shaft specification. Key Features Designed to correct thread pitch and diameter specification for the Series 3 less 1 ton gearbox mainshaft Must be tightened to the manufacturer's specified torque setting and staked or locked as required to prevent backing off under vibration OEM-equivalent specification ensuring direct fitment without modification When replacing this nut, inspect the mainshaft thread, associated bearings, and locking washer or tab washer for wear before reassembly Vehicle Fitment This mainshaft nut fits Land Rover Series 3 vehicles in the less 1 ton category, covering the standard powertrain variants within that classification. Not sure about fitment? Feel free to get in touch at [email protected] Show more