Posting an update. I got the new sending unit from LectricLimited installed and took it out for a test drive. We are now reading about 20-30* low. I plan to call LL next week and see if they might have other options. Hopefully, if they have the data on these sending units there will exist one which will give an accurate reading. In the meantime, if you have an LL unit, please post your results up. Cal
