They could even pay me to own a Chrysler produect and offer the lifetime drivetrain warrenty, i would still refuse. Think of it like this, would you like to have a warrenty on something for life but have to take it in regularlly and drive a rental half the time, or pay a little extra and never have to worry about the dowtime. If you can stand that downtime ( i wouldnt be able to) then fine.
Look at it this way, so they offer a "lifetime warrenty" on certain parts. How long do the majority of the people hold on to vehicles, not very. I bet they already have the statistics stating how many vehicles would be brought in after that 3 year mark. How many of those vehicles are just leased is also another factor.
That and on the Dodge truck and jeep side of things, the warrenty would get voided quick in some states. Most people (here in texas that is) love to lift their new Dodge or Jeep. Thats all well and good, but making changes to the "DRIVETRAIN" are done with a lift. Driveshafts are angled more, more leverage, and more wear and tear probably, but as soon as you bring in your (not you, people in general) jeep lifted they will not file that under warrenty cause they can directly prove (most of the time) that you altered the original design and voided your warrenty.
Personally I would also get an older jeep, but thats just me. Im the guy who would throw a 4" lift on it with nice tires and what not
forgive the grammer and spelling, it's been 24 hours since I have seen my house or a bed for that matter.