I searched for a thread on this, but perhaps my problem is unique. My '91 348 TS is in for a major. The bellhousing had oil contamination, due to a failed o-ring, so the clutch is being replaced. The problem is that the flywheel is worn and "heat checked" on only one half. It is like looking at two different flywheels photoshopped together. My mechanic, and his machine shop guy, have not seen this before, and that worries me. The other wierd thing is that the allen-head screw that locks the clutch assembly nut in place came unscrewed, causing damage to the small cover (with the cavallino). Any ideas on what could have caused the strange wear pattern? Any effect from the allen screw backing out? I'm sorry I don't have a photo of the wear, but trust me, it looks like two halves from different cars. Thanks brothers!