Got two kills. One on the way to work last night and one on the way home this morning. First one was a 06ish Chevy 2500 duramax, lifted on about 35s. Had an exhaust and a Banks sticker on the rear glass. Both stopped at a red light. turns green and we each keep jumping a little bit at a time until about 30 and we both punch it. By 65 I had about 2 trucks on him.
The second was about an 03 Mustang GT. I was in the far left lane of a 3 lane road and he was in the far right. both at a stop light. Turns green, I give about 1/2 throttle to get to speed, about 3200 rpms, then the Mustang comes flying by me so I punch it. was going about 30 at the time. I caught up and had about 2 trucks on him by 60. I need to figure out why the truck doesn't want to shift into 3ed at wot.

 

Does it just hang up there? or hit the rev limiter?

 

it bounces. here it happens when I hit 60mph. shift point is 6000 rpm and 58mph

 

Mph seems low compared to rpm or your 3/4 clutch is on it's way out.

 

running 4.56 gears. its always been low. When I was NA I was shifting at 6900 my 1-2 was at 38mph and my 2-3 was at 72mph

 

If his 3/4 is that bad he should be able to get it to slip under a load. Is it commanding the shift? Log it to find out.

 

yea it looks like you might wanna log for some trans slip..

 

which PIDs in efi live should I be looking for?

 

i cant rem.. but i think you can log input shaft speed and output shaft speed?

 

Is your line pressure maxed at the 2-3 shift?