Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.The codes P0731 and P0732 indicate you may have a loss of pressure and it could be something as simple as a very restricted transmission filter. Has the transmission been service recently? If not I would start there first, change the fluid as well as the filter.I have also enclosed the pinpoint test for these codes in the link below.https://dl.dropboxusercontent.com/u/104923897/P0731%20Dec%2023.pdfhttps://dl.dropboxusercontent.com/u/104923897/P0732%20Dec%2024.pdf
Its not likely a speed sensor concern. Its usually a loss of pressure issue. Your going to need to run the test steps I sent you to narrow it down.
A bad pinion bearing will not cause the transmission to slip.