So the other day i went to the post office before work. Got back in my car, and when I pressed to clutch to fire it up, I heard/felt a nasty grinding noise. I could not put the car in any gear at all, so I quit while i was ahead. I bought new clutch master/slave cylinders since i had a minor issue with those before. I replaced those, and my car still grinds when trying to shift. Do you guys think its the clutch or the transmission . Please help!

 

I think You can also try using Sodium Hypo Chlorite based products, they are particularly useful for solvent emulsion cleaner, easily dissolves soiled oil and grease deposit in automotive parts. it works for my machine.