These transmissions are 100% electronically controlled and the only way to verify that they are operating correctly is to have it diagnosed with a scan tool and a thorough road test. You can feel something that isnt right and there is always a cause for it but without a proper diag it is near impossible to know the cause. Very often these transmissions have a failing pressure control solenoid-this is a solenoid inside the transmissions that controls line pressure based on what the computer tells it to do, but needs to be determined if the computer is commanding the harsh shifts or the solenoid is at fault. The computer or PCM takes all of the input information from engine sensors and calculates how the transmissions should work from these inputs. As you noticed the MAF sensor being bad caused problems and has a large impact on line pressure. There is no reason to rule out that it could be at fault again and wouldnt hurt to have it checked. Most MAF sensors are reman units which are nothing more than cleaned and tested used sensors with a reman sticker on them and unfortunately the environment that they are tested in is not the same as driving down the road in your car so though they may test good on the bench they may not work properly in the car or can fail under certain conditions such as high temps or humidity. Does the car behave differently under cold or hot conditions? I would definately have the car diagnosed again by someone who is knowledgeable with these transmissions and if they arent doing a thorough road test with a scan tool then they dont know what they are doing. Driving around the block with no equipment and trying to say something is wrong is bad information you cant trust.
