I just got a 1999 Dodge Cummins in the shop with a clutch issue. I got it pulled out today and this truck has a single disc ceramic clutch. The clutch has completely eaten a deep groove approximately 1/16" to nearly a 1/8" in the pressure plate and about 0.010 groove in the flywheel. Surprising there was zero hotspots in either face. The friction plate was still in good shape but it completely ruined the pressure plate and flywheel will need to be turned. This truck is stock for the most part ot