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At a glance under speedo, your final drive ratio is wrong. Also your vss rotations for tire size is likely off which will make the trans command the shift late. Correct that first and try to make...

Was the shift mph and rpm. Also the vss rev.

Did you resolve this issue?

Thanks

Any benefits from locking the converter in 1st gear? Mostly drag race the car, and it has a 4l80 in it.

resolved, I found the issue.

Polling is set to the fastest setting in current gear pid. Car never went to 2nd.

Alvin, see the attached log. It never made the shift to 2nd before it bumped the limiter. The tune has 45 mph and 4000 rpm as commands across the board WOT.

134249

thanks

so the controller was the issue? not the trans

Im having this same issue, was this ever resolved?

134149

The second set of high RPM spikes is the 1/8th mile pass at the track. The first set is the burnout. I will have to log another pass once the rain stops to show trans current gear and fast...

Yes, traction control is off. In the log I see

6741 rpm "Trans Shift Solenoid pressure Mode" change to 2nd TCC off at 1:25.311
6839 rpm "Trans pressure mode" changed to "Shift" at 1:25.381.

Alvin, I have called PCM multiple times and I have had a tuner there look at my tune. I overfilled the trans by 1qt also. Still misses the 1-2 shift command in the logs. I have the shift MPH set to...

I have a 2011 SS Camaro which came with a 6L80. I swapped to a 4L80 using the PCM of NC harness. I am having issues getting the car to shift from 1-2 at WOT, no issue normal driving. I noticed in my...

Thanks I will try this. My current state has the car shifting, but commanding the 1-2 shift at 6800, and Im asking it to command it at 6000. Wondering if changing my settings to what you sent will...

Thanks for the quick reply and your time, but I wasn't clear enough in my post. I converted from a 6L80.

Does this look correct? Shift Solenoid Pattern for a 4l80e? Im using a t42 to control it and a PCM of NC 6l80 conversion harness. 134058

yes, I tried lowering the shift rpm and mph with no luck

Still chasing a shift issue. Im trying to see if I have a transmission issue or a traction issue. Some past logs show the tires are spinning, should the trans still make the shift? 1-2 is the...

Wondering if it could be a ecm issue?

pulling the trans, something has to be wrong. Still no luck on the 1-2 shift at the racetrack

my next logs will include these, thanks

thanks to everyone. I made the changes suggested so far and will test it Friday night.

I will have to get a gauge on it. I already tried lowering the rpm and mph.