The multi-plate LSD debate never dies: rebuild on a schedule or run it until it tells you it's done. Some guys pull the diff every 30k miles, measure the shim stack preload, and swap clutch plates before they ever feel a symptom. Others argue that if it's still locking under power and you're not getting one-tire-fires out of corners, leave it alone. Here's the thing though — by the time your S2000 is chattering through parking lot turns or your Evo is pushing wide on throttle mid-corner, those clutch plates are already glazed and the shim stack has lost the preload that dictates your initial torque bias. You're not driving a broken diff, you're driving a slowly dying open diff. The shim stack is doing the real work in there, and most people don't even know it exists until a shop hands them the rebuild quote. So which side are you on — preventive maintenance on a set interval, or ride it out and rebuild when it speaks up? Send this to the friend pricing one right now. #ThreePieceUS #...