[trularin]

It mounts in the tailstock, opposite the shifter plate pads. It is like 7/8 Inch and there is bolt hole, 3/8 head, something like a 1/4 threaded hole next to it. The speedo gear is installed in the hole and the metal retaining clip is bolted via that 3/8 head, 1/4 hole bolt.

Hope this helps.