So lately my gear box has been feeling less smooth than usual and I occasionally grind a gear when the clutch is all the way in. I just got near gearbox oil put in (a good one) and still I don't think it feels as good as I want it to. I hear about people putting an additive to reduce friction and give smoother changes. I know there are negatives to using engine oil additives but what about gearbox oil additives? Has anybody used something similar? What did you think of it?
Here is the item I'm talking about http://www.supercheapauto.com.au/online-store/products/Nulon-G70-Gearbox-Differential-Treatment-125g.aspx?pid=1397#Description
Dylan.