Okay, I have this transmission in my '85 Chevy S10. The old 3 speed version finally bit the dust a few weeks ago and I found a 4 speed version to replace it. So, I am looking for a way to manually turn on the "lockup" with a toggle switch. I have written to the salvage yard I got the transmission from to send me the 4 prong molex plug for the transmission. It appears to actually have only three connections. So I need to know how to power them. It looks like (from the exploded views I have seen) that there is a "switch" and a "solenoid" in the valve body area. But I'm not sure how that works. Any insight?
Attached are some pics of the truck so you can get an idea what I am working with.
Mike