Well woke up this morning headed for work I get in the teg and try to put in it reverse, no go. It acts like there is something blocking it from sliding into gear, all other gears work great 1-2-3-4 all shift smoothly cept for 5th gear, if i shift to 5th over 3krpm it grinds for a second then slips in, below 3krpm its very smooth.. but now reverse will NOT go into gear... I have had clutch problems, keeps getting air in the system I have to bleed it once a week...

does anyone know what could be causing this?