[Second Series]

This is good for any transmission with 40 tooth reluctor, range will be slightly different with other gear ratios and tire sizes.

So, this is what I have done for now. I will continue to look for a suitable motor, probably a cordless driver from a second hand shop. They are in the right range, and include gears. I tried looking on-line for motors, and gears with poor results. The Mabuchi RS-555PH was suggested in that other thread, but it needs to be geared down.
I need to build the box, get a connector for the speedometer cable. Where can I get the connector like on a transmission that the cable attaches to? 5/8” thread for GM?
I’ll take some more o-scope readings of the VSS.
Breadboard the discrete components to modify the VSS signal for Arduino, etc.