So been trying to help a buddy out with his truck.
08 E38/T42
Heads/cam 6.0
Rpm level 6 4L60E
4.10 gears

It is shifting 3-4 at WOT.
No matter what MPH/RPM I put in the tune, it shifts at the same mph (about 100mph) every time.
Even in manual 3rd, set tow/haul to max rpm/mph and even tried Bi-Di control to hold 3rd gear and it still shifts into 4th.

I'll try and post log/tune in a little while.

I'm not too familiar with T42 tuning as much as I am with LS1B tuning so I may be missing something?


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