Even though similar in external appearance, the senders differ by model year as to their functions. Some are used to turn an idiot light on and off and thus are completely different internally. You will need the correct temp sender for your particular application. For a 300F, for instance, the sender's resistance will vary from approx. 10 Ohms to 75 Ohms, same as the gas tank sender... John Hertog Sag Harbor NY -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Albert Vannice Hi Group, I had the same problem with one of my Fs. Check the resistance of the replacement T sender. Although many can look the same and have the correct threads, I found that the resistance can vary markedly even though they are supposed to be "replacement" parts. If the resistance difers significantly from original specifications, the T reading at the gauge will be noticeably incorrect. Al Vannice ------------------------ Yahoo! Groups Sponsor --------------------~--> Home is just a click away.? Make Yahoo! your home page now. http://us.click.yahoo.com/DHchtC/3FxNAA/yQLSAA/8LmulB/TM --------------------------------------------------------------------~-> To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/