After a couple of wheeling events last year, the overheating continued. I had a radiator shop take a look. They said everything looked fine on the outside, but maybe the radiator was getting clogged over the many years of use/abuse. Ordered a new direct replacement radiator & cap a couple of weeks ago. Here was the thing, even though the old radiator had been drained of coolant and transmission fluid, it was still 4 pounds heavier than the new one. Installed last week. After the burping process for the LS engine, everything appears to have been fixed. Just finished wheeling this past weekend at Superlift ORV in Hot Springs, AR with the Arkansas Crawlers (brother is a member) - never had a problem, even when towing a Jeep Cherokee up a mountain trail. That made me exceptionally happy! Now to concentrate on the road wander...