60mph in park

What is your question?

My car is an 07 magnum when the car is in park the speedometer is at 60mph and when driving it it Reads at 120 but I am only doing 30 miles an hour before limp mode any idea what it could be any help would be appreciated

What makes this problem better or worse?

Nothing

How long has your 2007 Dodge Magnum had this problem?

Two weeks