Freewheel clutch control solenoid

The solenoid valve that routes engine vacuum to engage and disengage the front freewheel clutch when you shift the transfer case in and out of four-wheel drive. When it fails the front axle cannot make up its mind: the specialist describes the classic sign as the green front-axle lights on the dash blinking instead of settling, and the truck refusing to lock into or drop out of 4x4 cleanly. It is one of the first parts to suspect for that fault and it is far cheaper than the actuator or the transfer case itself — but a blinking 4x4 light has more than one cause, so confirm the vacuum supply and the actuator before spending on this. The catalogue lists interchange numbers alongside this one; let the parts counter cross-reference. The number and the fitment come from a Montero specialist's catalogue and an independent parts catalogue, cited below — good evidence for what a part number is and what it fits, and not factory literature, so read every figure on this page as the catalogue's claim rather than as a service-manual specification.