I have the 3.0l in my JT, 5" lift, 37's, 34k miles and it's been great. Love the torque, it gets up and goes and get's great mpg's ( 27 mpg). I never had a 3.6, I've had a 3.8 and have a 6.2 in my JKU. I can't see myself ever going with a 3.6l after having so much available torque.