So truck has been shifting fine , decided i wanted to try a new tuner out to help me with little things and just to get a better tune than what i could do. Fast forward 2 tunes in and my truck still isnt even able to get it self out of the garage i went back to my old tunes

seems ever since then now my truck wont shift at WOT. I know other turbo'd trucks with 4l80 have complained about wot shifts and there are things to do to help it out. Now my truck pretty much sits on the rev limiter till i let off the throttle

I lowered the shift mph and rpm a little that didnt seem to do much.

here is a log and my tune, if anyone has any suggestions id love to hear them

 

pretty sure my speedo is fairly correct, i only have my phone as gps but it seems to match good

looking at my 1-2 partial throttle shift in tow haul shifted at 19mph and thats when its commanded

 

so did some changes

1-2 shift im commanding 49mph and 5200 rpm. it shifts right at 6k and 63mph. is it normal for it be that far off?

partial throttle seems to be about 3 mph off. my 1-2 shift via my log said 19-20mph and 27% throttle. if i go off my map for that im commanding 15mph at 25% and 17 at 31 so its a bit off so im sure that is affecting wot aswell

 

I have this problem with my 4L80e at WOT. Seems to be directly related to power. So on 8lbs, it shifts perfect. But if I go up to 13lbs, it misses the shift and bounces off the rev limiter. I moved the commanded shift point to 4800rpm or so and it seemed better but I haven't been back to the track since.

 

so in this thread Bill talks about revs per mile being off and it doesnt actually go by MPH that the scanner reads its calculated

I dont quite understand how to fix it though
4L80 not shifting WOT

 

Would your max torque vs rpm table have anything to do with or not helping with this??

I see the max number in there is 376 ft lbs, but all your other tables are maxed out.

Under the speedo tab, the tire size is 30.93 but the calculated tire size is only 24.72.

On my 20's with 275/55's the calc tire size only dropped from 31.9 to about 31.

 

Wow that thread makes me wonder what my tune looks like. Sure would be nice if that is the problem. Let me switch over to the windows side of my computer and check it out. . .

 

Looks like my tire/rev's per mile info is dead on. So it just must be something internally in my trans..?

 

Mine shifts within 25 rpm of commanded at WO. Did all of you do a segment swap? Or is anyone using the 60e tune with relays?

 

im segment swapped