05 Tahoe ,112k,2nd owner has thrown these codes.Wasn’t shifting into 4th/overdrive when it happened.Drove it home about 10 miles at about 50 mph and parked it. Next day started it and it shifted fine.Took it to shop and had it scanned.PO785 &P2761.Noticed when it shifts into 4th I hear a weird noise like scrubbing @ about 45 mph then slow down to about 40 when it downshifts and the noise goes away.So took to tranny shop and had him drive it and he thinks it’s my torque converter.