Things like this happen all the time. Your transmission craps out on you. We know.
It totally sucks. Often times it costs more to replace the transmission than the total value of your car.
In that case, it’s time to buy a new car. Or you could find a more, shall we say, creative solution.
Not sure how? This guy’s old Nissan Pathfinder is exactly that: old. Aside from being all dented, reverse gear doesn’t work. But instead of declaring it totaled, this guy figures out a solution.