It wound up being my torque converter was going out I got my transmission rebuilt no more issues. Also I was having an issue with my mileage and weird shifting that I thought was related to the tranny, turns out that was the MAF sensor needing to be cleaned. That was easy to do just buy the cleaner made for it.
I have been having a similar issue, seems to be after v4 to v8 and under 2000rpms with the greatest noise being at 1100-1300. The rpms fluctuate up and down 200 with steady pedal. I’m over the “warranty” and have been told numerous possibilities as to the cause. It sounds like a chatter, with vibration, and after reading some of the forums I have been driving in M5 without the noise. Can I continue driving it like that? Is it ok to do at interstate speeds? I love the truck otherwise but now wish I had kept my Toyota.
These parts are trash and GM knows it. I had it replaced by the dealer, it worked till the warrantee ran out and went bad. They wanted $1300 the first time but GM had some assistance program (I think it should be a free recall) so I paid a few hundred. Now the new one has gone out and it’s out of warrantee. Poor quality and service
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