Irregular revving going down the road
 

2010 Ram 1500
5.7 hemi 2 wheel drive.
Had a code pop up that I couldn't delete that's been on for a few days but nothing out of the ordinary was happening so didn't think much of it P0740 Torque Converter Clutch Circuit Malfunction
Until today where I was going down the road with cruise control on doing about 60 when I felt and noticed the RPMS fluctuating for a few seconds then stable then doing again. Few months ago the transmission would jump out of drive and get locked into 4th gear and would have to turn truck off and start back to clear it