When shifting from 3rd to 4th quickly it feels like I hit a wall in neutral and it wont go into 4th. However, after it (the shifter) hits the wall and stops, i can pull it into 4th normal. It shifts fine when shifting really slow, but it wont go from 3rd to 4th quickly, anyone know what problem might be? I have a clutch adjuster and thats tight and it doesn't grind, it just won't go in.