Ive been researching various owner forums, dealer service bullitins, and consumer reports. Ive come to the conclusion that the 3.6l Pentastar found in Grands, Caliber RTs and others since 2007 and now in 2012 Wranglers are very picky and unreliable. The block casting process is known to create very porous surfaces and hinder internal parts as a result among other problems. Much like the Liberty and comamder 3.7l that were eventually abandoned because of reliability...you have to ask yourself, Why? Why did Chrysler dump our beloved 4.0l? Polution and conservation? Nah thats BS. Ill deal with the changes because I have to, but I wont like it.