Well, here I go again. My car is losing power again. Maybe it is the catalytic converter. Haven't pulled the 02 sensor out yet to see if it stops. Frankly, we are sick of working on it. I do have another question for now though. On the transmission I know it is MN7 and 4T65 EG. It has a lot of miles on it so I'm thinking of going to salvage yard for one.(???) They make reference to XAB and XXB. Does anyone know which one I need? Thanks again for any info I can get.