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Personally I've never heard of that being a chronic problem with any of the 855 cu.in. series through the years, maybe someone else has. The typical double disc pull clutch/flywheel assemblies are about all the same and trouble-free too. Unless he finds something obvious like overtorqued grade 5 (instead of grade 8) bolts, or whatever, that might be a tough one to figure out. Any outside drivers that might be putting it under a shock load at times? However in heavy trucks the weakest link is purposely designed to be the driveshaft because it does the least damage and is cheapest to fix. Under a severe enough shock load it will twist itself into a pretzel and break rather than something more spendy.
Last edited by LMJD; 10-28-2009 at 09:06 AM.
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