When I am doing about 30-20mph, and am about to stop at a junction, where I know I will have to stop, I shift my car into first gear
However, sometimes when I do this, it makes a quick gear grinding noise when I shift. It lasts for about 1/2 a second.
What is this? Am I destroying my gearbox by doing this?
EDIT: I keep the clutch down until I am stopped! I don't shift into 1st at 30!
I'm not asking why my engine is exploding! ;)