The transmission only has first gear, Neutral, and Reverse?

when in drive truck won't shift out of 1st gear. Can only go about 20 MPH and RPMs go very high about 4000-4500 but won't shift gears. goes in reverse okay. goes into neutral. Also, when i use the shift lever, it will not register various gears always leaving one of the gears out. For example, I pull lever down from P to R and dash will display nothing and then ill pull lever again So from R to N and it will display R but it should be in N at this point. I will pull lever down to last gear which should be 3 but it will display 2. When I put it in D, and begin driving, regardless of if i attempt to manually shift it to 2 or 3, no shifting is actually taking place in the transmission. It's as if the transmission is not receiving a signal to shift gears. It doesn't feel like it's even trying to shift gears. Also, there are no codes or check engine light.