That is what happened to po of my car went to work one day everything fine.(1.5 mile) Went to leave that night nothing. Seems funny now but he backed home, I was the guy in front or behind depending on perspective with the 4 ways on as he putted to his house.
It wound up needing a new tranny.

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86 300SDL. 250,xxx on #14 Head. One eye always on temp gauge.. Cruising towards 300K