I have had some other problems with the car, so other than adding some transmission fluids, I didn't address this problem. I did take it to a transmission shop for a free road test, and of course, he couldn't replicate the problem. And then winter hit.


This year, the transmission is slipping again, and I am getting a 0730 Improper gear ratio code. I will try to check the traction control, and transmission fluid. I have seen some other posts reference the I/C Pump, but I don't know where or what it is. They also reference the NAG1 Plug, which I presume is in the transmission.