Transmission question-hard to shift from park

[vitamin_c95]

Curious about my th350. Anyone had an instance where it was hard to shift.out of park? I thought it was just the incline of where I park (4 times now, twice in driveway). Yet, when I parked in the street (level) It still fought me coming out of park. Only out of park, rest of gear range shifts like butter. I am able to gently rock the truck and shift it out of park when ever it does get stuck, which is why I thought it was binding up in the park pawl. Its comparable to a newer car with the shift lock mechanism not letting you shift until you hit the brakr pedal. Is that something internal, or is it something else?