Turned off engine to load trailer onto hitch. Started, will no shift out of park. Got under truck move trans linkage into drive,drove to work. Put emergency brake on, shifted linkage back to park, am able to startagain. Applide the brake shifted once into reverse but went forward. Put back up once, applied e brake again and shut off. The cable is loose down by the tranny.

Thought:

Repair cable/linkage, position shifter in Neutral, and adjust cable/linkage so that the neutral safety switch allows the engine to start in Park.