3.6 Pentastar
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I have a 2012 JKU auto and was one of the unfortunate one's to get the 3.21 axle gears. I'm hoping it opens up a with more mileage, it's a bit of a dog at normal acceleration right now. We'll see how it goes, I didn't have this issue with the 08 JKU manual with 3.73's (with the mini van engine). I'm a perplexed with Jeep in that they thought the it would be ok to keep it geared with the 3.21's with a tow package...who tows just 1000lbs?




