2004 Toyota Hilux stuck in neutral

Hello everyone, I have a 2004 4x4 single cab 5l-e Hilux which is unfortunately having gear box dramas. I was driving on the highway a few days ago, pulled off to check something, (would have only been stopped a minute or two) and when I went to go again the gearbox was stuck in neutral and would not budge. I found that the shifter bushing (part no. 33548-31010) was deformed and stretched, I had only replaced it a few days prior but stupidly forgot to grease it which I am assuming is why it failed after a few days. I replaced it again the next day (and greased it this time), but the ute was still having the same issue. I was able to get into 5th gear once, and when I let the clutch out it was trying to move under its own power, went back to neutral and it has not been able to engage a gear since. Despite the issue, there wasn't any worrying noises, until I was pushing it while the engine was running, (to get lined up to winch onto a car trailer) when a high pitched grinding noise started. The noise has persisted and only goes away when the clutch is pressed down. Any ideas as to what I may be dealing with here, I was thinking something wrong with selectors/forks as the noise only started while it was being pushed with the motor on, sounds like its now stuck halfway between neutral and one of the gears. Any input is greatly appreciated.