My 97 was down for about 3 years with the head off. I reassembled it replaced radiator, hoses, thermostat,, everything except the water pump. I know I even had it sitting on the shelf. Put it all back together drove it about 100 miles and the water pump blew. Towed it home tore it down where it sat without the water pump for about 4 months. Reassembled with new pump. After adding coolant and bleeding, roughly 2 gallons and whatever it took to fill resivour. Drove it on a few short trips and everything seemed fine, had to add a little fluid. Yesterday I took it to get my kids from school about 20 miles. When we came out to go I noticed some coolant leaking on the ground, maybe 2 inch circle after sitting an hour. Under the hood there were a few drops of coolant near the rad cap but nothing alarming. On the way home the temp gauge began fluttering wildly. Never going over 210 but falling completely to the bottom as if the ignition was off. Then it would bounce up and down. The jeep never overheated no engine noise, just crazy gauge. I figure I will start by cleaning the connector on the temp sender and go from there. Any of this sound familiar? Any idea what's going on?