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6L80 bad slip/flare shifting from 3-4
I have a 2011 turbo Silverado. Trucks transmission was rebuilt and only has about 5000 miles on the trans since the rebuilt. Truck has been running great until last night. It started slipping and flaring bad going into 4th gear. I reloaded the tune and did the reset preset after and that did not change anything. On the data log the clutches look really close to were they have been engaging and disengaging, only thing different is the huge timing dip where its not making the shift. The transmission fluid looks and smells fine on the dipstick. I'm not sure what to do, I don't want to hurt the transmission. Here's a data log, thanks for any help.Attachment 136614