And so the saga continues......!
My tuner managed to write a new tune to the trans via the seperate DLC which is part of the PCS kit. This got rid of the delayed shift/ flare on the 4 to 5 shift on light to medium throttle, but we then started experiencing a new problem - a harsh shift from 5-6 on anything over 30% throttle. Occasionally, this harsh shift would be felt on the 4-5 shift too, which is exactly what it would do on the old tune. All other shifts up and down are fine and the trans works fine in true manual mode. Driving home that day, I could feel the trans playing up in 6th at cruising speeds, although the gear indicator stayed mostly steady showing 6th, whereas previously it would flicker from 5-6-5 or 4-5-4 unless in manual mode.
We noticed whilst logging on HPT that the trans is randomly changing from normal to pattern A. This can happen at any throttle opening and in any gear, but you can only feel it causing an issue in 4,5,6. The original Holden Commodore Power button by the gear selector has been reconfigured to switch the trans to manual mode via the PCS TCM2650, so I disabled all the digital inputs on the PCS software, to take this out of the equation, just in case. It made no difference.
My tuner then made normal and pattern A data the same, but again, no difference to the shifts. It would seem that the switching patterns is in sync with the flickering gear number on my display/ HP Tuners log and in the PCS software.
In the HPT log, you'll see the harsh shift from 5 to 6 about halfway in, just look for the highest speed peak.
I'll send these files to Jim at ZGP too. Thanks in advance for your help.
https://1drv.ms/u/s!AvYJGSX0WE3IkFnc...Oqlfx?e=gBsJSD
gearbox tune oem v3.hpt
2023-03-15-Wednesday_at_AM-10-41-02-w-Dig Inputs correct and adjusted shift table A and tapshift.bin
gear 1.hpl