Back on the topic of automatic transmissions, is there anyone that can log his AW55 transmission, specifically the torque limitation request (param request A5 13) and tell me how much limitation you are getting, because during shifts I am getting very huge torque limits during each shift, and I wanted to know what the normal values are.
For instance, my AW55 transmission issues a total reduction to 75nm between 2-3 shift(and I have seen as low as 50), for a duration of 450 milliseconds. Because of these huge huge reductions, my shifts are terrible. I have a feeling that when the gearbox is deciding to shift, it is first trying to prime various hydraulics before initiating the torque limitation request, and the feedback from the main solenoids is what gives it information of where in the process it is.
Since I have probed various internal memory structures not previously documented you will have to bear with me. In the image below you can see the F0 memory address which is the first address to get updated signaling the intent of the logic in the TCM to upshift, in this case 102 is 3rd gear so 2nd to 3rd.
From then on we can see that about 500ms later, the TCM has decided that for the 2nd to 3rd gear upshift, the torque will be limited to 75nm.
Then if we scroll to my log further down to where the limit is back to normal, we can see the limit was even reduced further, not by much but reduced. If we calculate the duration from the timestamps, it was fast, 430ms, but the torque reduction is still felt.
Of course someone will say, that is fast, but I can give logs where shifts happened much slower, a torque reduction for a duration of 1.5-2 full seconds. As you know from newton's laws, every action has an opposite and equal reaction. As the engine produces torque propelling the car forwarc, the engine itself wants to move backwards. In normal operation you won't notice this, but imagine you are accelerating and your gearbox shifts and reduces torque a lot, your engine will now rock backwards and forwards for a moment.
I just want to know what a good shifting AW55 does to the torque limits when shifting, so I can further understand it.