what would cause a vehicle to stop going into gear and when i turn the key it don't engage?

Question

out of nowhere it stopped going into gear. and when trying to start it nothing happens in order to make the vehicle move i have to get under the van and do the gears manually

Answer 1

Your cable has play or is broken!!!

Answer 2

Maybe two things have gone simultaneously. your gear linkage (hence the not getting gears) and your starter motor solonoid. Tap it with a hammer. It may be more than that but this is the best I can think of. Good luck.