I am pulling my automatic antenna out and replacing it with a basic manual one. Mine has never worked any way. Universal manual antennas seem to come in two base sizes, 1" and 3/4". It looks like our cars would use a 3/4" replacement. Is this right?

 

Measure the size of the hole in your fender.

 

Mine's always been a little spacious in there. I glued it on with silicon, but I would sure like to jam some kind of spacer in there. Did you guys have to do this?