I seem to be having a bit of trouble with the first gear of a 2004 Opel Corsa. I have pulled off the gear stick cover and cant see anything stuck so it must be something that is more internal. When i try to move into first gear from neutral it often gets stuck, same for the reverse gear which is in the top left position and 1st is right next to it on the top. By stuck i mean i cannot push the gear stick in fully, it feels like something is blocking it from going in. If I press the clutch and move into 3rd gear then back into 1st it usually works as normal. I can also wiggle the stick sometimes when it only feels partially blocked and this gets rid of whatever is blocking it.
The issue persists when the engine is not running. Going into first still gets stuck, so im guessing its the gearbox that is at fault. There doesnt appear to be any issues getting into the other gears its only the top left gears which would mean the bottom right of the gear box?
I would like to see if i could fix this myself as the local mechanic always gives a crazy quote (200 to tighten a handbreak). Can this even be fixed or is the gearbox fit for the bin?