4l80e Shifts early

[anniversaryss]

I havent had time to try anything so figured I could check in here. I used the Blucat trans tool and everything seems fine except an early 1-2 shift. Its set to 6600 but will shift around 6400. 2-3 seems ok.
What is the remedy to this? If i wanted to go to say 6800rpm i wouldnt want it to shift early there as well.

So what now? Raise WOT shift speed? Its def getting shift speed. Raise WOT shift RPM in 1st to see if it offsets?

Thanks guys.




Tune6_MAF_6600_USE.hpt
20-08-22 19-34-41.hpl

[Lakegoat]

That's a head scratcher. Yeah, you are at 51mph and 6400rpm when it shifts, and your shift tables give you several mph cushion. Maybe set the shift speed to 50mph and see if that gets you closer to 6600. It is supposed to need mph and rpm to shift, which you have. You might check your speedo calibration section to see if that is off a little ?

[anniversaryss]

That's a head scratcher. Yeah, you are at 51mph and 6400rpm when it shifts, and your shift tables give you several mph cushion. Maybe set the shift speed to 50mph and see if that gets you closer to 6600. It is supposed to need mph and rpm to shift, which you have. You might check your speedo calibration section to see if that is off a little ?

Ill compare any calibration from blucat to my tune when i.have a minute


And yes i was gonna raise the mph as well

[anniversaryss]

Everything was fine except i notice the tire diameter was set to 24.91 vs the actual 25.66. Not sure if it would effect this but i noticed my speedometer was about 2mph diff than the scanner. About a 3% difference, which is the same as the tire diameter difference.


So i made a new tune for that and another one with the WOT shift speeds a tad bit higher.