[Basketcase889]

I have read reviews about sending units as I need to replace mine too. I know you looked up the model number and such as most did that as well. I read that you need the correct year of sending unit for your gauge and not the engine itself. There are a bunch of different years of units that all look the same but have different resistance inside the sending unit itself for different year gauges. A lot of people that bought the wrong ones had the gauge show as it was overheating and it wasn't. They put the stock unit back in and it ran normal again.

So seems to me the resistance may be off on your unit? Not sure if it is a year specific issue or if you had the right part both times and there is something off elsewhere. But wanted to share my experience just as an extra bit of knowledge.