I have an '11 STS V6 RWD w/50k miles. Last week I started noticing a harsh clunk or bang when releasing the accelerator, slowing slightly then light to mid reacceleration. I've been trying to find a way to drive without causing this until I find a fix but it happens frequently. I inspected all mounts, bushing, flex joints, ect today but everything still looks great. I'm almost positive it's in my transmission and wondering if anyone else has experienced this. Any help would be appreciated, thanks.
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