Parts for Caterpillar 3408B for Canada - Sensor & Switch Section Loading... 1 Speed Sensor for Caterpillar 3406 and 3408 Engines 5N6753 Magnetic Pick up Price: $ 201.18 Qty: ^ Details Availability Out of stock 2 Speed Sensor for Caterpillar 3406, 3408 and 3412 engines 3181181 Magnetic Pick up, 3-pin Connector type. Price: $ 152.28 Qty: ^ Details In Stock Add to Cart 3 Speed Sensor for Caterpillar 3408 engines 3E7886 Magnetic Pick up Price: $ 177.20 Qty: ^ Details In Stock Add to Cart