Judging by some of the posts here, I believe there is much confusion regarding vehicle warranties. Here are some things to consider.
1) Your vehicle's factory warranty is just that. A warranty between you (the vehicle owner) and the factory, not you and the dealership. (Beware when purchasing secondary warranties. Make sure it is an authentic factory warranty.) Dealerships don't make as much profit on warranty repairs and many will try to convince you a particular issue isn't covered under the warranty. Once you have paid for the repair, the factory can not help you. While the factory does have influence over dealerships, the factory can't force the dealership to do anything, including service your vehicle under warranty. What the factory can do, prior to any work being performed, is agree that a particular problem should be covered under warranty and help you to find a dealership willing to perform the work as such. Remember, both the labor and the parts come from the dealerships pocket until the dealership is reimbursed for the expense. I suggest calling the factory customer service number before taking any vehicle in for warranty work, whether it be a broken radio knob on a Dodge Neon or a Jeep suspension component.
2) Many so called Mopar performance parts are in fact, not Mopar. They are instead made by other companies and sold as Mopar parts, if they exist as a Mopar part in the first place. Go ahead and call your dealership and ask them for the Mopar part number for a lift kit, then call Mopar direct and ask them for details (parts list, instructions or anything else) and see what the factory has to say. I have yet to see a part number for a factory lift kit. Mopar does have a part number for a winch though. If you ever see such a winch, you'll never know it is a Mopar part as it is made by Warn. Again, beware what the dealership tells you, call the factory customer service number if you have any questions.
3) Some dealerships are simply better at honesty than others. This shouldn't need any further clarification, although it is sad. I would be willing to bet that dealerships in smaller or more rural areas are better at honesty and customer service than many dealerships in large cities that simply don't care about repeat business.
4) To be fair to dealerships, some people expect some things to be fixed under warranty that are painfully obviously not covered. Anyone who works in customer service in any field can attest to unreasonable expectations by customers.
5) Always call the factory customer service number first, even if a particular problem is your own fault. They may cover the cost of the part even though they don't have to. The factory can not commit to the labor being covered, however, as they service technician who will be paid to perform the work is an employee of the dealership, not the factory. If you have purchased multiple vehicles from a particular dealership, you may even get them to give you a break on the labor in the hopes of retaining you as a customer, just be patient and don't make unreasonable demands.