New 2ME MKT Owner

Hi everyone. Thanks for reading this. I just got my hands on a 2011 MKT with 230K on it but it's solid...aside from a transmission/torque converter that needs to be rebuilt. Anyone here know how to decipher the tranie codes? Mine is AA5Z7000HRM and this model is currently on 'back-order'. Every parts org I search comes back with AA5P 7000 XX. Not sure which of these substitutes for my 'unique' unit. p.s. getting shudder and 'rumble strip' noises from the TC. Maybe just replace that? Thx, W