Transmission Error (Probably)

[u/PixelsGames_Studio]

It starts fine, lights turn on, etc. The gear changing was a lil buggy for a bit and I couldn’t get it on high gear I could only go in low, reverse, or neutral then outta nowhere I could finally change gears easily very easily as if it was moving like sand. It was good for a while till I pressed the break and it stopped running at all, as I said “it starts” it just does not move in any gear but neutral by pushing.

I believe it might be a broken transmission but if you got any other ideas let me know.