Hi Ethan,
This is an issue inside the transmission with what is called the synchronizer. This is responsible for messing the gears together to engage the one selected.
Usually, when you shift into a gear that just grinds it is because the blocking ring (part of the synchronizer) has failed and it is not allowing full engagement.
Here is a guide that explains for of this. Step 5 is where it starts talking about this. Unfortunately, the only solution is to disassemble the transmission and replace this component.
https://www.2carpros.com/articles/how-a-standard-transmission-works
SPONSORED LINKS
Wednesday, May 8th, 2019 AT 3:43 PM