the chain in the transfer case will only turn when engaged into 4 high or 4 low. the chain is only there to operate the front wheels. with a busted chain all you will have is two wheel drive but you have the ability to use the low range as normal, you not have 4 wheel drive. i have modified transfer cases to do do just that and installed them in what i call "ghetto sleds".
It allows the chain to transfer power from the pedals to the rear (drive) wheel.
change the transfer case fluid
Check the vaccum lines to the transfer case
It is on the top of the transfer case.
The 2010 Dodge Challenger has rear wheel drive.
The 2009 Dodge Charger has rear wheel drive.
The 2006 Dodge Charger has rear wheel drive.
The 2004 Dodge Durango has rear wheel drive.
The 2011 Dodge Avenger has front wheel drive.
The 2014 Dodge Journey has front wheel drive.
The 2009 Dodge Avenger has front wheel drive.
The 2011 Dodge Charger has rear wheel drive.