I have a 96 5 speed. When i go from 2nd to 3rd most of the time it grinds, and every once in a while 4th will also, and when i let off the gas in 4th every once in a blue moon it will pop out. When i down shift it always grinds in 3rd. Its enough that i go from 2nd to 4th every chance i get. What is causing this? Easy fix or would i ave to get a new tranny to stop this?? Thanks in advance, Roger.