Hello, guys, I'll be talking about my 1998 Buick Park Avenue today. From looking at the title you have probably seen this issue before, but mine is different. When I accelerate above 1.5 RPM a horrible grinding noise ensues causing me to rip my hair out. I've replaced both the right and left wheel bearings, replaced brake pads, fixed my faulty exhaust that was hitting, but none of these were the issue. My vehicle is still grinding and vibrating when accelerating. What other issues could this be? The CV joints looked fine, everything regarding the wheels is okay. Could it be a transmission issue possibly? Thank you for any feedback.

Open up the hood with the engine running, and goose the throttle via the linkage on the throttle body. See if the noise is coming from one of the pulleys.