80s or 90s movie

[hustlerburns]

Grandfather used to work for some government agency. Old employer comes asking him for help. His grandson races his stepside truck. Grandfather builds semitruck with gadgets. Grandson, at advice from grandmother, hides inside truck. Something happens, and they need to use the grandson's truck, which was place inside the trailer, for the rest of the trip. They need to avoid road blocking pillars that pop up and down. They make it past them. Grandfather beats up old employer. Then the movie ends.


For the life of me, I cannot remember the name of this movie.

[akiratubo]

Thunder Run.