We see 100 plus here, only had the truck long enough to go through a week of hot weather, and the temp runs 200-210 on the freeway with the A/C on , the temp creeps up to 215 after a long freeway run and get into stop and go, but it comes back down to the 200-210 after a bit. In slow off road conditions in 95-100 degree temps, (29 Palms a month ago), it stays around the same with the A/C on. The system has been flushed, and new hoses and a stant stat installed. I plan on installing a 3 row BTR, a new w/p and a Mopar stat before our next trip out to the southern deserts this fall.
Volunteer, American Society of Military History. http://tankland.com/
Just got a 1989 YJ too!