Hoping you can help a new guy. This is for a 1967 mustang but I don't think that really matters. I have a new T5z transmission and an electronic speedometer/instrument panel from New Vintage USA that came with a vehicle speed sender/sensor thing that looks like below. It is a 3 wire Hall effect unit and I am pretty sure I have it wired properly. It lights up and wants to program per the instructions but after reading "SELF Hi" as it should and pushing the little red button at the end of a measured mile it reads "CALC ing" as it should and then wont program. The speedometer needle doesn't move and the odometer doesn't record miles driven. I don't have a traditional Speedometer cable because I don't think I'm supposed to need one for this. I think I have the sensor attached to the transmission correctly. There is a little oblong metal end on the sensor into the transmission. Is there supposed to be something that fits over that end before installing it? I called New Vintage and they suggested I call CJ Pony Parts to see what they have. CJ Pony didn't know what I was even talking about even after consulting a supervisor. They said they don't have anything for that. I'm dumb about things like this and all the other instruments work fine. What am I missing or doing wrong? Help?