ok heres the deal my trans shifts fine at all rpm 1st to 2nd but sometimes when i get on it to like 8 grand in my GSR and and try to hit it really fast it sometimes grings but goes in gear im thinking that it my have something to do with the way im hittin the clutch but im not sure and it only does it once in a while it doesnt grind at higher rpm like 7 or 8 grand if i shift normally or somewhat quick only if i try to hit it realy really fast

so can someone please help me out here thank you

 

try changing oil and put fresh oil in there, then try again.

 

im almost positive that it is becasue i shift way way way to fast 1st to 2nd cause i hit it really really hard im crazy lol ;-)