The retaining plate secures the rear propshaft flange to the differential output on early Land Rover drivetrains, preventing axial movement of the flange under load. Without a correctly fitted retaining plate, the flange can work loose, leading to vibration, propshaft misalignment, or accelerated wear on the output seal and bearing. This part applies specifically to vehicles up to chassis number WA159806, where the original flange design requires this discrete retaining component. Key Features Designed to retain the rear output flange at the differential, resisting rotational and axial displacement Corresponds to the early-specification rear flange assembly used up to chassis number WA159806 - verify chassis number before ordering Matches original OEM dimensions to ensure correct bolt engagement and clamping load When replacing, inspect the companion flange, output shaft nut, and rear output seal for wear simultaneously Vehicle Fitment Fits Defender (1986–2006) up to chassis WA159806, Discovery 1 (1989–1998), and Range Rover Classic across rear flange and speedo housing powertrain applications. Not sure about fitment? Feel free to get in touch at [email protected]