basically my car wil not go into reverse at all. so far i have goten it in twice when i go to put it in reverse it just wont go dwon like its being blocked. but the two times i did get it in it glided right into reverse. i thought maye it was the clutch but it glides into everyother gear without a prob. the other thing i thought was maybe it was the linkage. anyone now what it might be??