4L60E guys again having a fluttering in 4th i cant figure out

[jdmcrx]

Hey guys once again having issue with my tune on the 4l60e

its a 2010 sierra 4.8 with a tvs2300 2400 stall with a 4L60 with some sonnax valve body parts , super servo.

issue im having is in 4th gear im getting a surge where you are crusiing and the rpm are jumping up and town like the trans is slipping or something.
lube.hpl
lube2.hpl
bluecollarscteforcever3transchanges rev1chengedtclock.hpt

trans says LUBE when this is happening

posted the logs and tune .

[blindsquirrel]

As a test, do whatever you have to do to disable the bypass valve so it stays in the 'open' position. I know on the LSA's just removing/capping the vacuum hose defaults the valve to open all the time, I don't know what's on yours.

[jdmcrx]

Never thought of that could be slight blower surge ?

I?ll do that now and log ,

it?s the same as the LSA vacuum actuator !

Thanks

[jdmcrx]

So guys i had a suspicions that my band was either too loose or wearing out. I removed the pic cause the play was too much welded the tip and set it to .065-.075th and she works real good now.