If you continue to have sending unit issues, I'd reinstall the original unit. Buy a gallon of EvapoRust and soak the sender in that for a couple days. I bet it comes out looking new and will probably work better then a new one.
Burdar: I do not think it possible that the original sending unit would do the trick. In the picture, that I am hoping will upload, I am sure you can tell which one is new and which one it the original. The originals resistor has been eaten away and so does the wiper arms connection pin.
