Hi all,
I have a Mercedes turbodiesel running with a 2015 6L80 behind and a PCS TCM-2650 sending the relevant torque, TPS, and RPM signals to the 6L80.
Everything works quite well, but there's one problem: massive shift flare between 5th (TCC locked) to 6th:
1) 5th gear (TCC locked, all is well)
2) TCC unlocks, RPM flares way up
3) Shift to 6th takes place
4) TCC locks shortly after
See the 2:59:206 mark in the attached log.
The PCS unit is set up to signal a shift event to engine controller so it can pull fuel as a method of torque management. This function works fine in 4-5 upshifts, but for some reason not 5-6th.
Are there some parameters that control whether or not the 6L80 requests torque management during a shift?
Or is this just a problem any time there's an up-shift from a locked gear?
Thanks for any help in advance.