do I have a tranny problem????

[Jg240]

Today I was driving home from school and I accelerated through second gear to about 40mph, and then I go to put it in 4th and GRIND. So I just put in third then 4th and no problem. So I drive normal (first, second, third, fourth) the rest of the way to where I drop my friend off and no problem at all. So I decide to test it and see if earlier was a fluke...So 3 times I get up to 40 and go to put it in 4th and twice GRIND and the other it went. Yes I did make sure the clutch was depressed. So my question is are my synchros bad? If so I'm screwed 'cause I have all of 3 dollars. Or am I jsut an idiot and shouldnt bedoing that? Or is it something else? Any and all help is very much appreciated.
Thanks much ...JG

[thelinja]

Th problem may be with your syncros, or you could just use a change of tranny oil. My second gear used to randomly grind at times. I changed my tran. fluid 3 months ago and it hasn't happened since. Also, you could try double clutching (clutch-neutral, clutch-gear), see if that helps.

[Jg240]

anyone else?