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I am fairly sure that the Astra G (Mk 4) models withoutABS have the speed sensor in the gearbox, and the ABS models take the road speed from the left-hand front wheel hub. Unfortunately, the gearboxes fitted to ABS models have the speed sensor hole plugged, so this is something to consider if replacing the gearbox.
In the gearbox
the speed sensor is located ar the rear of the gearbox pointing upward. there are 3 wire coming out which plug into the loom on top of the gearbox. after unplugging the wire the sensor unscrews from the gearbox.
on to of the gearbox
The speed sensor is located on the top of a manual transmission gearbox, it would fit into the top of the gearbox and kept in place by a single bolt. It will have a detachable plug that will have 2 or 3 wires that plugs into the speed sensor in the gear box.
Hi Your output speed sensor is on the left of the gearbox right at the back it has two wires coming out of it.
Remove the wiring harness from your speed sensor. Remove the speed sensor retaining bolts. Reverse the process to install your new speed sensor.
The speed sensor on a Peugeot Boxer is on top of the gearbox. It is near the driver's side drive shaft inner CV.
Raise the vehicle and locate the speed sensor. Remove the electrical plug. Turn the speed sensor counterclockwise and remove it. Install the new speed sensor.
its a pickup sensor on the rear of gearbox and runs of a reluctor ring in the box same as a abs sensor ring
IT DOESENT HAVE A CABLE IT HAS A SPEED SENSOR LOCATED NEAR THE OS DRIVESHAFT GEARBOX END WITH WIRES GOING TO IT
it is a device that is inline of the speedo to give the speed of the vehicle its normally on the gearbox.