Hi team, we have a troublesome baby here and we are a little lost after trying quite a few ideas so any thoughts on the attached tune/log would be very much appreciated
07 Holden Commodore SS Ute, 6.3L L98, Magnusson blower, 6l80E about 450kW/750Nm at the hubs with very sloppy shifts - bad flaring, very long 1-2 often harsh when finally shifting, but basically crap shifts 99% of the time at all throttle % except sometimes fine at very low speed/throttle %. I'm seeing way too much trans slip under WOT (upto 2800rpm) and low/erratic pressures on PCS 1 Cmd Pressure and TCC slip looks to be OK. I'm not sure if its a related issue yet but it also wont change 2-3 with WOT, she just bounces off the rev limiter.
This is the second rebuilt stock trans with the TeCHM from the previous trans (recently replaced after only 2-3000miles and found metal dust all through it - yes from the dealer) The owner complained of losing all gears when in WOT a number of times and had to turn the car off and back on to get them back. It did on one occasion do it while being scanned by us and it brought up a stuck solenoid code but that has never returned.
Has a new secondhand wiring loom, runs overfilled fluid, new cooler and lines but still runs into 'Trans Shift Mode - Hot' with average, very little WOT driving. We have also tried an adapts reset and relearn, trans data from another stock 6l80 we know worked well (as the figures were really off compared to what should have come from the dealer when they originally reprogrammed it) all with no luck.
My theory is that the TeCHM is buggered but of course writing a new one to this vehicle is an expensive test if its not the issue. Is it possible that the metal dust/filings we found have corrupted the TeCHM in some way?
Thanks in advance
VE Commodore SS ute 6.3L A6 Magnusson ECM+TRANS.hpt
trans_slip_bad_shifts_081222.hpl