What is this gearbox sensor?

This sensor has broken off while transporting our mk3 vr6 gearbox. What is it please?

 

Clutch slave cylinder by the looks of it.

 

On the diff?

 

Actually, it looks like it has come off from here. Reversing sensor?


So what is the little tower bit in the first picture?

 

Yep that's the reversal sensor/contact. It came off on my GB too, but it can be mounted back quite easily. I measured with the voltmeter and it still works

 

What the slave cylinder attaches to?

Yes, on the diff.

 

Ignore me lol

 

Got to be the VSS if its on the diff. part of the gearbox.

(vehicle speed sesnsor)

 

Yes, got to the bottom of it. It is indeed the speedo connection. I need to use a mk2 1.3 cable to connect it to the cluster. I’m pretty sure this is already what we have with the box we have on the car (I forget what box it is connected to the AGG).

 

Unscrew top bit, it's speedo drive.

 

I thought so, thank you

 

I am very curious about why the slave cylinder is mounted on the diff, as far from the clutch as possible. Or is it just (external) mounting?

 

It’s not. Think there was post order confusion above

 

Yeah ignore that post!