Nope, just a regular ole level5 60e. Only thing special is billet shafts for 4x4.

 

try this one out, zero'd out the shift times which disables the adaptive learning. you were set at .2 for the lower range of the 1-2 shift, anything lower than .25 is a no-no

 

I forgot about I drove a yukon with ETC and it would automatically disable traction control when you put it in first so that might be why.

But my truck has mechanical throttle and if you manuel shift to first at about 30mph it will shift into first harder and faster.