I have a 2016 Camaro 2SS with a 8l90 transmission. I am having a weird issue after driving for 5-10 minutes around town the car will shift up into 8th gear then downshift then upshift. I then seem to get a shudder cruising around 45-50 low rpm. There also seems to be a clunking or metal clanging noise coming from the rear of the car. I checked for any loose bolts and looked at driveshaft and half shafts. I don't see anything out of place. I have attached a log file of the last time I had it out
Attachment 93725
Attachment 93726 .