Gas gauge not working? I think I fixed it.

I needed a new gas tank, so put in the new one with the same sender that came out of the damaged tank. When it had approximately 12 gallons left, the gauge read a little above the full mark.
I put on the new tank and put 5 gallons of fuel in it and the gauge reads Empty.
I am not happy with the results of my fix on the fuel gauge.
I will continue to play with it and wait to hear about if Kitcarlson's fix works.

If I add one gallon at a time, I will see what I need to know

Ed