2011 5.3 with AFM/DOD and a 6L80

[double047]

My 5.3 was NA just had Nelson Tune, CAI, Headers, Muffler.

Wish the video was working so you could see what the new 5.3s are capable of with a good tune.

[KY_BOB]

I may still have Allen do a tune for me but I couldn't resist playing with it a little any longer. Here's is what I did:

Eliminated the speed limit that the TB could open in 1st gear
Lowered PE delay from 5000 to 2500rpm
Eliminated speed limiter (actually set it for 150)
TCM commanded TM disabled
Brake stall rpm eliminated (it was 1500 rpm)
slightly raised 1-2 shift points under light throttle
Reduced shift time "normal" (non-TH mode) adder by 50% on all upshifts


DAMN! it's now scratching the ground on 1-2 AND 2-3 shifts and the 3-4 shift will jerk your head back. I did not touch the engine TM, just the trans TM. It feels like a different truck.

I drove it around a little at lunch and think that the adaptive learning is softening up my part throttle shifts.

Anyone have any input? Did I go too far with reducing the TM? This thing is shifting like my old Avalanche did with a shift kit and tune.