2001 rancher350 ES wont shift

Hi everyone, new here this is my 1st post. I bought a 2001Rancher350 ES off craigslist. It was stuck in 2nd gear and wouldnt shift. After I got it home and fooled around with it i found this out. I couldn’t get it to shift manually so i took off the shift motor thinking there might be something jammed up. With the shift motor out I can manually shift it, also with the shift motor out if I press up or down the motor will work. I put it back together and the same thing wont shift and I can not shift manually. If i put my hand on the shift motor and press up or down I can feel the motor engage. I also took apart the shift motor and cleaned up the inside and put it back together, still wont shift.Kinda like its binding up. Any help Please…. Thanks