You can't get a REAL LEGAL contract with a vehicle dealer, they just op on warranties and good will-
Do your own oil chg and tire change/rotation-leep receipts and follow the maintenance book schedule in the back of the warranty book-sign/date your work, keep all receips-simple and you'll KNOW that the things detailed in the book are DONE !!
Just remember that any time you have a warranty item that NEEDS to be done-it's a fight with the dealer, almost everytime-NO MATTER HOW YOUR MAINTENANCE HAS BEEN FOLLOWED --just the way they operate-especially if you've made any changes to the jeeps stock attitude
Not trying to scare you, but warranty coverage has ALLWAYS been trouble with dealers and it's got nothing to do with Chrysler or jeeps-