it goes in gear or all but everyonce in awhile i have to mess with it like going through the gears and then trying to downshift and it wont shift to a lower gear....its a mojave and to get it to go to alower gear ive got to use the little indecater that shows the gears by hand and when i twist it i shift it and then im fine what would it be ??????the shift fork wearing out or cluth or what please help

 

anyone ????????????????