8l90 Strange shudder and shifting

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 .

Theirs a GM recall for this. Most are covered under warranty and require a trans and torque converter flush with a new fluid. Might want to look into that.

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Originally Posted by regorih

Theirs a GM recall for this. Most are covered under warranty and require a trans and torque converter flush with a new fluid. Might want to look into that.

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Thanks for your response. I don't have dod or AFM and I have a circle d converter. This strange shudder and shifting has just began happening. I don't think the fluid is causing this issue. I'm debating on bringing it to the dealership.

I would appreciate some feedback on this. Please take a look and let me know. Thanks