Dodge offered a basic powertrain warranty, but the length of that warranty varied. It likely ranged from 3 years/36,000 miles to 5 years/60,000 miles, but you cannot know for sure without reviewing the original warranty documents that came with the vehicle when it was new. This is *not* a guaranteed length, only a range of what was typical for powertrain warranties at that time.
To determine the exact original drivetrain warranty coverage for a specific 2009 Dodge Challenger, you would need to look at the original warranty booklet that came with the car or contact a Dodge dealership with the Vehicle Identification Number (VIN).