What are the consequences of having a jeep flywheel "turned"? The JEEP repair service manual (RSM) & Haine's manuals don't agree.Jeep= never turn

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2003 jeep wrangler Sahara. Clutch replaced @ mechanic shop 3 times. #4 JUST WENT...!!! Bought used 8.2013 needing #3 (9.6.13), #4 @2.23.14. Went again 9.2014. CRAZY TO replace #5, but need to know WHY???