check engine light is on pulled codes P0700 & P2767 what will fix this?

Both of those codes have something to do with the tranny. the p0700 is a transmission control system malfunction, or TCM. The p2767 is a speed control module malfunction. They more likely than not could be linked since the speed sensor is in the tranny, which would cause the control system malfunction code if the sensor is bad. Unfortunately the nest way to tell is have a professional with a scanner that can communicate with the TCM and pull the codes on that to see what the real problem is. Is the speedo working right?