I have a 1997 2500 4x4 supposedly with a georend torque converter and a georend browns valve body. I drove it one day it worked fine then went to drive it a few days later and it wasn't shifting right. I had 3rd and reverse could manually shift it into second no first. Also my speedometer is not working and my trans temp guage is reading around 180 or so all the time with key on, and the indicatopr light for my torque converter lock is always on no matter what position the switch is. I ran the codes and got P0743, P0753, P1762, P1765. One of those codes has something to do with the governor pressure sesnor behind the trans filter and I read on how to check that was ohm meter from 21 pin on the harness to the center spade on trans relay slot which came back to 30ohms. It seems to me like a wire or sensor the fluid isn't burnt. Any help would be apprieciated.