Did some mudding this past weekend, when I was done and headed home I got about half-way back and looked down to see my coolant temp was running way too high and I was going to overheat soon if I didn't stop.. so I stoped and let her rest for about 20 minutes and then made it the rest of way with no problems. I didn't pay too much attention to it at the time but the engine is making some horrific noise, it sounds like marbles or rocks in a hampster wheel or something. I cleaned up the enigne pretty good but no luck... I havn't had any more cooling problems but I am starting to get anonyed and worried by this noise. I've got 60k miles on the truck, luckily I have 100k mile powertrain warrenty so I'm going to finish cleaning it up tonight/tomorrow and take it in this weekend. Before I go to all that trouble has anyone else ever experienced this type of problem? Thanks.