(Like someone once said, this is not an MOT issue [8)).
I now have in my grubby paws a RA drive adapter (modern one!) and a speedo gear.
I also know that something that feels suspiciously like the speedo gear output shaft is where it should be in the gearbox. (Canna be rsed to hoist the car just yet).
Now, the plastic output gear looks like it is designed to take a 2mm square drive shaft under load. When I look deep into the bowels of the RA drive adapter (RADA) on the Gearbox side I also see a similar 2mm square hole designed to take the same 2mm square drive shaft.
What I do not see is a 2mm Square drive shaft.
Looking at my RADA I would say that it is designed to take such a beastie and that it was a push-fit job into a plastic housing - all designed to shear under extreme badness.
So, has the 2mm drive shaft that I would expect to see fallen out onto the track somewhere (RIP) and would I be wise to just order a new RADA and offer a sacrafice to the gods at Spares?