I bought the Jeep April 23 2007, purchased a lifetime powertrain warranty from Don-a vee Jeep located in California for $1000(forum special/forum sponsor). 49,000 transmission and dana 44 rear end replaced and they regeared it for me with gears I purchased from TF. All I paid for was gears everyting else was free. 77k on odo now. I just took it in today for my 5 year inspection and the dealership said "normally with a Jeep modified like this we run into problems, but your Jeep checks out ok. Everything is with in factory tolerances." Saweeeet!!! I love my dealership out here in JoMo. This is how she sits today. I love my "mini van powered slush box auto transmission Jeep". She is paid for. Just for shits and giggles I test drove a 2012 4door. All the Pentastar talk about power is just hyped up. If I want to drive something that feels faster than the Jeep I will drive my wifes Lexus sc430. At least it has a small V8.