GMC Other

I have a 1990 Chevy Beretta 3.1 5spd. The other day I was going down the road and I started to press on the gas to go up a hill and it started to rev up like I had the clutch in. Before that when ever I left when I let off the clutch the front end of the car started to vibrate. Now it tries to take off but it wont. And I can but it in gear without pressing in on clutch and it still wont do nothing. I was just wondering what could the problem be. A couple people told me the clutch cable could off broke or came off adjustment. And I was just wondering were do you put the transmission fluid in it at. Thanks for your time. Please let me now somthing.
February 17, 2006.

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