Very likely the socket has broken the "ears" to hold it in the hole. So won't stay in the hole.
Broke because Tiny bulbs generate enough heat to cook the socket.
see
https://web.archive.org/web...cast.net/~fierocave/ light bulbs
Has alternate 73 bulb that are a bit dimmer, less heat and last longer.
Many that fix this have use dimmer bulbs or remove the 70 bulb or break the socket again and leave it because shifter and other lights there can cause problems driving at night w/o external lights hiding reflections on windshield etc.
Lights for ashtrays and cig lighter can cause same problem.
See cig lighter in cave how light works when not blown...
Think those bulbs are on the Dimmer Circuit for the dash and even dim bulbs bounces off the windshield and annoy many drivers.
To drive, you don't need to look at the shifter.
Push button only to get out of park then the gates tell you R N or D w/o looking or holding the button.
But Once in D or N do have to push the button to get R or P or lower gears.
see auto shifter in cave.
------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave