Grinding.

[gt96stanggt]

My 2nd gear grinds when i shift fast and my 3rd gear grinds no matter how i shift. Anyone know what this is?

 

[9646gt]

Try changing the tranny fluid and make sure to put exactly the required amount back in ( i think it's like 3.5 quarts) as for what type of fluid to use you will get many opinions...if that doen's help tho your syncros or shift forks are probably damaged and the tranny will need a rebuild ( I am in the same boat myself) but if you have an aftermarket shifter installed make sure the stops are set correctly or you will damage the tranny big time..Tremmec also has issued a notice not to use the shift stops at all as the trannies have integrated ones but many still use them..jsut my thoughts but starts with a fluid change