Do you have Tone's seat extenders installed? I started experiencing a high-pitched rattle shortly after I installed them, and it turns out the springs on the bottom of the seat were making contact with the extenders. Contacts passes vibrations into the smaller metal springs, and voila, high-pitched rattling.
Btw, thanks for this thread rowhard. I've had the same problem with the levers on the driver's seat (of course it doesn't slide, but I can't flip the seat forward without grabbing both handles). Looks like something to do over the weekend if I can ever find the time.![]()