Since a few of you guys run 4L60E on your LS motors, maybe you all could help me on this. My '08 Silverado started to make a sound like clutch chatter at times over 55 mph & at times coming to a stop. It will go away when I give it gas. I don't feel a vibrations at all & it doesn't happen all the time. It mostly happens after everything has warmed up. The transmission dosen't slip, still shifts smooth & when it should. This all started right when I started to notice the left front wheel bearing was going. I did try to hit the brakes to see if it could be the solenoid but didn't stop the chatter. The only other thing I cam across is it could be the diffs (G80 gov-lock?) due to old oil. I'm trying to avoid worse case with a $2800 rebuild/replace at the the only transmission shop in the area, a franchise AAMCO that doesn't have a good rep.