How do you remove the speed sensor that is on top of the trans on a auto trans 7.3 4x4.

I replaced the one in the rear diff and now the speedo works up to 40 mph, and the abs light went away.

So the only thing i can think that wont allow the speed to go over 40 MPH is this speed sensor that's on top of the trans, but im not sure how to get to it

 

You are just randomly changing sensors? How come? What codes are stored?

If you want to change it, it's just like the one in the rear. One bolt, one wiring harness, and it just pulls out.