A fuse that blows again every few days means something on that circuit is touching ground intermittently, and the transmission solenoids going dead with it says the short is somewhere on the circuit that feeds them. A new solenoid will not fix a pinched wire.
The way to find an intermittent short without eating fuses: pull the fuse and put a test light (or an old headlight bulb with two leads) across the two fuse terminals. The bulb acts as the load. With the key on, it glows dim or not at all when the circuit is healthy and lights up bright the moment the wire shorts. Then wiggle the harness section by section while you watch it, starting at the transmission's case connector and along the run where the harness passes near the exhaust and the crossmember. When the bulb flares, you are standing on the spot.
One more thing before you wiggle anything: on these years the fuse that feeds the transmission solenoids also feeds the four heated oxygen sensors, and a shorted oxygen sensor heater is the most common thing that takes it out. With the test light in place, unplug the oxygen sensors one at a time and watch whether the light goes dim.
To see what else shares that fuse, the fuse charts for the 1998 to 2011 Crown Victoria include the battery junction box layout plus 1998 and 2000 charts. Those years are not exactly yours, so match the printed legend on your own fuse box lid:
https://www.supermotors.net/reference/ford/crown-victoria/1998-2011/fuse-relay-chartsDana