is this diagram correct? lockup converter

How about coupling this with a vehicle speed dependant switch that is active above 60mph? Then you could potentially have a fully automated solution with no driver input required.

I like that idea... but my car is a carb'd engine with no computer.. can you give details on a switch like that?

Three comments:- Yes, your diagram is correct. Tommy, oy vey is my domain (actually mum and dad when they thought we couldn't understand). Awdeclipse, great idea but I think at least quite a bit of extra circuitry would be required apart from a Hall effect transducer around the speedo cable.

B&M already makes a lockup control module, adjustable speed for lockup too.

Ween wrote: B&M already makes a lockup control module, adjustable speed for lockup too.

I dont run a speedo cable, i have a GPS speedo. I could run it off the transmission, but that BM setup is very old tech. its totally 80's. lol

Yes but unless you have a Hall effect switch with an electronic speedo, you will have to put a conversion sensor on the existing or original cable to give you electronic pulses. You can't do that with your GPS which incidentally lags on true speed by up to 11 seconds. (distance to nearest 3 GPS satellites averaged out and divided by light speed plus the unit's process speed). You could break the gearbox inside the GPS response time.