Transfer case switch crush washer

The sealing washer that goes under a transfer case position switch. There is one under each of the switches, which is where the quantity above comes from, and it is a crush washer: it seals by deforming once, so a reused one is a slow gear-oil leak down the side of the case. It costs almost nothing, and the labour to go back for it costs the same as the first trip. While a switch is out, take the detent ball below it out too, clean it and its cavity, and put the new washer on with the new switch. The number, the fitment and the count come from the Montero specialist's own catalogue page, cited below — a parts catalogue is good evidence for what a part number is and what it fits, and it is not factory literature, so read every figure on this page as the catalogue's claim rather than as a service-manual specification.