Wondering if anyone knew why it sounds like my motor knocks when I turn the ignition off. It doesn't make a knocking noise at all while driving just when I kill the motor and it makes a loud knocking noise. Motor mounts gone bad? I only have 83,000 on it so im kinda confused on the reasoning.

 

Sounds like you have something loose in the engine bay. I say it's not engine related only because you say it doesn't happen when it is running , at all. Pop the hood. Have somebody start and shut off the Jeep a few times while you look closely for anything that could be causing your noise. Look from the top and the bottom if necessary.

 

check your motor mounts and transmision mount also see if anything is touching against something maybe something came loose