Genuine Toyota OEM R154 Speed Sensor and the speedometer driven gear (33:10).
This suits a 4.1 ratio differential but will still work with any other diff ratios the reading will just be out, unless you adjust it with an aftermarket ecu.
Note: This product does with the gear for a direct install. This is to suit both our gearboxes we offer as the gearbox do not come with them when brought new.