There are two different 8/80 Chrysler warranties available.
The Certified Pre-Owned 8/80 Powertrain Warranty, which comes with all CPO cars.
Also
The Maximum Care 8/80 available for cars that already have the CPO 8/80 Powertain Warranty. The Maximum Care is defined as thus:
This plan extends your vehicle's powertrain and basic component coverage beyond the 3-year/36,000-mile manufacturers warranty and covers 5007+ components - providing virtually complete mechanical coverage for your vehicle
The Maximum Care is available in a bunch of different term lengths, but on CPO cars it only comes as an 8/80 or 8/100. Maximum Care is a bit cheaper on CPO cars since a portion of the warranty cost will be born by the underlying CPO powertrain warranty.